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A ball striking device, such as a golf club, includes a head with a face having an outer surface configured for striking a ball, a body connected to the face, an elongated, inwardly recessed channel located on the body and extending across a portion of the body, and an insert mounted within the chan

A ball striking device, such as a golf club, includes a head with a face having an outer surface configured for striking a ball, a body connected to the face, an elongated, inwardly recessed channel located on the body and extending across a portion of the body, and an insert mounted within the channel. The insert includes a resiliently deflectable base member that engages the channel to retain the insert within the channel and a rigid outer member connected to the base member and forming at least a portion of the outer surface of the insert, where the outer member is made from a different material than the base member. Additionally, the insert has an outer surface that is substantially flush with at least one immediately adjacent surface of the body.

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1. A golf club head comprising: a face having a ball striking surface configured for striking a ball;a body connected to the face, the body and the face defining an internal cavity;an elongated, inwardly recessed channel located on the body and extending across a portion of the body, the channel com

1. A golf club head comprising: a face having a ball striking surface configured for striking a ball;a body connected to the face, the body and the face defining an internal cavity;an elongated, inwardly recessed channel located on the body and extending across a portion of the body, the channel comprising a trough that is inwardly recessed with respect to adjacent surfaces of the body, wherein a slot is positioned within the trough, wherein the body has a thin-wall construction, such that the channel creates a raised portion on an interior surface of the body; andan insert mounted within the channel and engaging the channel to retain the insert within the channel, wherein the insert has a projection received within the slot, wherein the projection being received within the slot retains the insert within the channel, and wherein the insert is exposed to an exterior of the golf club head. 2. The golf club head of claim 1, wherein the channel has a wall thickness that is smaller than a wall thickness of a portion of the body adjacent the channel. 3. The golf club head of claim 1, wherein the slot extends completely through a wall of the body to the internal cavity. 4. The golf club head of claim 1, wherein the insert comprises a first piece made from a first material, the first piece including the projection, and a second piece made from a second material that is different from the first material, wherein the second piece is in contact with the first piece and forms at least a portion of an outer surface of the insert. 5. The golf club head of claim 4, wherein the first material has a greater degree of flexibility than the second material. 6. The golf club head of claim 1, wherein the body comprises a top side and a sole configured to confront a playing surface in use, and wherein the channel is positioned on the sole and extends across a portion of the sole. 7. The golf club head of claim 1, wherein the channel has side walls extending inwardly from the body to the trough, and wherein the side walls and the trough are substantially flat. 8. A golf club comprising the golf club head of claim 1 and a shaft connected to the head. 9. The golf club head of claim 1, wherein the channel is located on the sole and extends across a portion of the sole, such that the channel is elongated in a heel-toe direction. 10. A golf club head comprising: a face having a ball striking surface configured for striking a ball;a body connected to the face and defining an enclosed volume between the face and the body;an elongated, inwardly recessed channel located on the body and extending across a portion of the body, the channel comprising a front edge, a rear edge, and a trough that is inwardly recessed with respect to the front and rear edges, wherein the channel is elongated in a heel-toe direction, such that the front edge and the rear edge extend in the heel-toe direction; andan insert mounted within the channel, the insert comprising a base member positioned within the trough and engaging the trough, and an outer member connected to the base member and forming at least a portion of an outer surface of the insert, wherein the outer member is made from a different material than the base member. 11. The golf club head of claim 10, wherein the outer member has a different degree of flexibility than the base member. 12. The golf club head of claim 10, wherein the base member has a greater degree of flexibility than the outer member. 13. The golf club head of claim 10, wherein the outer member is positioned completely within the channel and does not extend beyond the front and rear edges. 14. The golf club head of claim 13, wherein the outer member engages inner surfaces of the channel. 15. The golf club head of claim 10, wherein the body comprises a top side and a sole configured to confront a playing surface in use, and wherein the channel is positioned on the sole and extends across a portion of the sole. 16. The golf club head of claim 10, wherein the channel has side walls extending inwardly from the body to the trough, and wherein the side walls and the trough are substantially flat. 17. The golf club head of claim 10, wherein the base member has an innermost surface contacting the trough and an outermost surface opposite the innermost surface, and wherein the outer member completely covers the outermost surface of the base member and forms the entire outer surface of the insert. 18. The golf club head of claim 10, wherein the base member has an innermost surface contacting the trough and an outermost surface opposite the innermost surface, and wherein portions of the outermost surface of the base member are exposed and form portions of the outer surface of the insert. 19. A golf club comprising the golf club head of claim 10 and a shaft connected to the head. 20. A golf club head comprising: a face having a ball striking surface configured for striking a ball;a body connected to the face, the body and the face defining an internal cavity;an elongated, inwardly recessed channel located on the body and extending across a portion of the body, the channel comprising a trough that is inwardly recessed with respect to adjacent surfaces of the body, a front edge, a rear edge, and side walls extending inwardly from the front and rear edges to the trough, wherein a slot is positioned within the trough,wherein the body has a thin-wall construction, such that the channel creates a raised portion on an interior surface of the body, and wherein the channel has a wall thickness that is smaller than a wall thickness of a portion of the body adjacent the channel; andan insert mounted within the channel, the insert comprising base member positioned within the trough and engaging the trough, wherein the base member has a projection received within the slot, and an outer member connected to the base member and forming at least a portion of an outer surface of the insert, wherein the outer member is positioned completely within the channel and does not extend beyond the front and rear edges, and wherein the base member is formed of a first material and the outer member is formed of a second material that is different from the first material. 21. The golf club head of claim 20, wherein the body comprises a top side and a sole configured to confront a playing surface in use, and wherein the channel is positioned on the sole and extends across a portion of the sole. 22. The golf club head of claim 20, wherein the side walls and the trough of the channel are substantially flat. 23. A golf club comprising the golf club head of claim 20 and a shaft connected to the head. 24. A golf club head comprising: a face having a ball striking surface configured for striking a ball;a body connected to the face and defining an enclosed volume between the face and the body;an elongated, inwardly recessed channel located on the body and extending across a portion of the body, wherein the channel is elongated between a first end and a second end and is defined by two sides extending between the first and second ends, the channel having a length defined between the first and second ends, wherein the channel has a wall thickness that is smaller than a wall thickness of a portion of the body adjacent the channel; andan insert mounted within the channel and engaging the channel to retain the insert within the channel, wherein the insert has a first end and a second end, with a length defined between the first and second ends, and wherein the length of the insert is smaller than the length of the channel, such that the insert occupies a portion of the length of the channel and the first and second ends of the insert are spaced from the first and second ends of the channel and are exposed within the channel. 25. The golf club head of claim 24, wherein the body comprises a top side and a sole configured to confront a playing surface in use, and wherein the channel is positioned on the sole and extends across a portion of the sole. 26. A golf club comprising the golf club head of claim 24 and a shaft connected to the head. 27. A golf club head comprising: a face having a ball striking surface configured for striking a ball;a body connected to the face and defining an enclosed volume between the face and the body;an elongated, inwardly recessed channel located on the body and extending across a portion of the body, the channel comprising a front edge, a rear edge, and a trough that is inwardly recessed with respect to the front and rear edges; andan insert mounted within the channel, the insert comprising base member positioned within the trough and engaging the trough, and an outer member connected to the base member and forming at least a portion of an outer surface of the insert,wherein the base member has an innermost surface contacting the trough and an outermost surface opposite the innermost surface, and wherein portions of the outermost surface of the base member are exposed and form portions of the outer surface of the insert. 28. A golf club head comprising: a face having a ball striking surface configured for striking a ball;a body connected to the face, the body and the face defining an internal cavity;an elongated, inwardly recessed channel located on the body and extending across a portion of the body, the channel comprising a trough that is inwardly recessed with respect to adjacent surfaces of the body, wherein a slot is positioned within the trough, wherein the slot extends completely through a wall of the body to the internal cavity; andan insert mounted within the channel and engaging the channel to retain the insert within the channel, wherein the insert has a projection received within the slot, wherein the projection being received within the slot retains the insert within the channel, and wherein the insert is exposed to an exterior of the golf club head. 29. A golf club head comprising: a face having a ball striking surface configured for striking a ball;a body connected to the face, the body and the face defining an internal cavity;an elongated, inwardly recessed channel located on the body and extending across a portion of the body, the channel comprising a trough that is inwardly recessed with respect to adjacent surfaces of the body, wherein a slot is positioned within the trough; andan insert mounted within the channel and engaging the channel to retain the insert within the channel, wherein the insert has a projection received within the slot, wherein the projection being received within the slot retains the insert within the channel, and wherein the insert is exposed to an exterior of the golf club head,wherein the insert comprises a first piece made from a first material, the first piece including the projection, and a second piece made from a second material that is different from the first material, wherein the second piece is in contact with the first piece and forms at least a portion of an outer surface of the insert. 30. The golf club head of claim 29, wherein the first material has a greater degree of flexibility than the second material. 31. A golf club head comprising: a face having a ball striking surface configured for striking a ball;a body connected to the face and defining an enclosed volume between the face and the body;an elongated, inwardly recessed channel located on the body and extending across a portion of the body, the channel comprising a front edge, a rear edge, and a trough that is inwardly recessed with respect to the front and rear edges, wherein the channel is elongated in a heel-toe direction, such that the front edge and the rear edge extend in the heel-toe direction; andan insert mounted within the channel, the insert comprising a base member positioned within the trough and engaging the trough, and an outer member connected to the base member and forming at least a portion of an outer surface of the insert,wherein the outer member has a different degree of flexibility than the base member. 32. A golf club head comprising: a face having a ball striking surface configured for striking a ball;a body connected to the face and defining an enclosed volume between the face and the body;an elongated, inwardly recessed channel located on the body and extending across a portion of the body, the channel comprising a front edge, a rear edge, and a trough that is inwardly recessed with respect to the front and rear edges, wherein the channel is elongated in a heel-toe direction, such that the front edge and the rear edge extend in the heel-toe direction; andan insert mounted within the channel, the insert comprising a base member positioned within the trough and engaging the trough, and an outer member connected to the base member and forming at least a portion of an outer surface of the insert,wherein the base member has a greater degree of flexibility than the outer member. 33. A golf club head comprising: a face having a ball striking surface configured for striking a ball;a body connected to the face and defining an enclosed volume between the face and the body;an elongated, inwardly recessed channel located on the body and extending across a portion of the body, the channel comprising a front edge, a rear edge, and a trough that is inwardly recessed with respect to the front and rear edges, wherein the channel is elongated in a heel-toe direction, such that the front edge and the rear edge extend in the heel-toe direction; andan insert mounted within the channel, the insert comprising a base member positioned within the trough and engaging the trough, and an outer member connected to the base member and forming at least a portion of an outer surface of the insert,wherein the base member has an innermost surface contacting the trough and an outermost surface opposite the innermost surface, and wherein the outer member completely covers the outermost surface of the base member and forms the entire outer surface of the insert. 34. A golf club head comprising: a face having a ball striking surface configured for striking a ball;a body connected to the face and defining an enclosed volume between the face and the body;an elongated, inwardly recessed channel located on the body and extending across a portion of the body, the channel comprising a front edge, a rear edge, and a trough that is inwardly recessed with respect to the front and rear edges, wherein the channel is elongated in a heel-toe direction, such that the front edge and the rear edge extend in the heel-toe direction; andan insert mounted within the channel, the insert comprising a base member positioned within the trough and engaging the trough, and an outer member connected to the base member and forming at least a portion of an outer surface of the insert,wherein the base member has an innermost surface contacting the trough and an outermost surface opposite the innermost surface, and wherein portions of the outermost surface of the base member are exposed and form portions of the outer surface of the insert.