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A radial indexing head tool includes a handle and ratchet head, each with a splined orifice, and a floating splined pin disposed in the splined orifices for coupling them together. The floating splined pin includes a cylindrical axial retainer coupled to the handle and extending into the splined ori

A radial indexing head tool includes a handle and ratchet head, each with a splined orifice, and a floating splined pin disposed in the splined orifices for coupling them together. The floating splined pin includes a cylindrical axial retainer coupled to the handle and extending into the splined orifices, a plunger configured for axial movement within the axial retainer, and a splined cylinder configured for axial movement along the outside of the axial retainer within the splined orifices. The plunger and splined cylinder are coupled to each other through the cylindrical wall of the retainer. Movement of the splined cylinder aligns or misaligns grooves and splined portions formed on the splined cylinder relative to grooves and splined portions formed in the splined orifices to lock or unlock the ratchet head for movement relative to the handle.

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1. An indexing head tool comprising:a handle having a first splined orifice and a second splined orifice; a tool head having a third splined orifice; a splined pin assembly coupled to the handle and tool head, the splined pin assembly comprising: a retainer positioned within the first splined orific

1. An indexing head tool comprising:a handle having a first splined orifice and a second splined orifice; a tool head having a third splined orifice; a splined pin assembly coupled to the handle and tool head, the splined pin assembly comprising: a retainer positioned within the first splined orifice and the second splined orifice; a splined cylinder slidingly engaged to the retainer for movement thereon; a plunger sliding engaged to the retainer for movement thereon; wherein the plunger and the splined cylinder move independent of the retainer; wherein the plunger is affixed to the splined cylinder by a connector extending at least partially through the retainer; and wherein the third splined orifice prohibits movement of the connector out of the plunger, the retainer, and the splined cylinder. 2. The tool of claim 1 wherein the retainer comprises a central longitudinal bore and the plunger is configured for movement in the central longitudinal bore, the splined cylinder moving on the retainer in response to movement of the plunger.3. The tool of claim 1 further comprising: a plurality of splines on the splined cylinder engage the first splined orifice, the second splined orifice, and the third splined orifice when the splined cylinder is located in a locked position, thereby keeping the handle in a fixed position relative to the tool head; andwherein displacement of the splined cylinder into an unlocked position causes the plurality of splines to disengage the first splined orifice and the second splined orifice, thereby allowing the handle to change positions relative to the tool head. 4. An indexing head tool comprising:a handle; a tool head coupled to the handle by a splined pin assembly, the splined pin assembly comprising a retainer, a plunger coupled to the retainer for movement therein, and a splined cylinder configured for movement on the retainer in response to movement of the plunger; a cam lock for moving the plunger from a locked position to an unlocked position; wherein the cam lock comprises a cylinder, a piston disposed for longitudinal and rotational movement in the cylinder, and a cam lobe coupled to the piston; and wherein the cam lock further comprises an actuator and the cylinder further comprises a channel, the actuator being coupled to the piston and disposed in the channel for movement between a locking position and an unlocking position. 5. The tool of claim 4 further comprising:wherein the cam lock is coupled to the tool for engagement with the splined pin assembly, the cam lock being moveable between a retracted position, a locking position, and an unlocking position; wherein the cam lobe is positioned away from the plunger when the cam lock is in the retracted position; wherein the cam lobe is positioned over the plunger and does not depress the plunger into the unlocked position when the cam lock is in the locking position; and wherein the cam lobe depresses the plunger into the unlocked position when the cam lock is in the unlocking position. 6. The tool of claim 5 wherein the cam lock comprises a cam lobe, the cam lobe being configured to engage the splined pin assembly to an unlocking position as the cam lobe moves from the unlocking position to the locking position.7. An indexing tool comprising:a handle; a tool head coupled to the handle; a splined pin assembly far coupling the tool head to the handle, the splined pin assembly comprising a retainer, a plunger, and a splined cylinder; wherein the plunger comprises a plunger aperture; wherein the plunger is affixed to the splined cylinder via a pin extending into the plunger aperture; wherein the splined cylinder and the plunger are configured for sliding movement on opposite sides of the retainer; wherein a plurality of splines on the splined cylinder engage the handle and the tool head when the splined cylinder is located in a locked position, thereby keeping the handle in a fixed position relative to the tool head; and wherein displacement of the plunger causes displacement of the splined cylinder into an unlocked position causes the plurality of splines to disengage the handle and the tool head, thereby allowing the handle to change positions relative to the tool head. 8. An indexing tool comprising:a handle; a tool head coupled to the handle by a splined pin assembly, the splined pin assembly comprising: a plunger comprising a plunger aperture; a retainer comprising a slot, the retainer being configured for sliding engagement with the plunger; a splined cylinder comprising a splined cylinder aperture, the splined cylinder being configured for sliding engagement with the retainer; a pin sized substantially the same as the splined cylinder aperture and the plunger aperture, the pin being positioned within the splined cylinder aperture, the slot, and the plunger aperture; wherein the pin affixes the plunger to the splined cylinder; wherein the tool head or handle prohibits movement of the pin out of the splined cylinder aperture, the slot, and the plunger aperture; and wherein the retainer can be displaced relative to the plunger and the splined cylinder. 9. An indexing toll comprising:a handle; a tool head coupled to the handle; a splined pin assembly for coupling the tool head to the handle, the splined pin assembly comprising: a retainer having a central longitudinal retainer bore; a cylindrical plunger configured for longitudinal movement in the retainer bore; a splined cylinder having a central longitudinal cylinder bore; wherein the retainer is configured for longitudinal movement in the cylinder bore; wherein the splined cylinder comprises at least three splined portions located at different positions along the longitudinal axis of the splined cylinder; wherein one of the splined portions engages one of the handle and the tool head regardless of whether the splined pin assembly is in a locked position or an unlocked position; wherein when the splined pin assembly is in the locked position, at least two of the splined portions engage the handle or tool head not engaged by the splined portion engaging one of the handle and the tool head, thereby keeping the handle in a fixed position relative to the tool head with a plurality of shear points; and wherein when the splined pin assembly is in the unlocked position, the at least two splined portions disengage the handle or tool head not engaged by the splined portion engaging one of the handle and the tool head, thereby allowing the handle to change positions relative to the tool head. 10. The tool of claim 9 further comprising: means for coupling the plunger to the splined cylinder and for coupling the plunger and splined cylinder to the retainer for movement relative thereto.11. The tool of claim 9 wherein the tool head comprises a first splined orifice having a first plurality of splined portions and first plurality of grooves and the handle comprises a second splined orifice having a second plurality of splined portions and second plurality of grooves and the splined cylinder comprises a third plurality of splined portion and a third plurality of grooves, the third plurality of splined portions engaging the first and second pluralities of splined portions to rotationally lock the tool head to the handle.12. The tool head of claim 11 wherein the third plurality of splined portions aligns with the first and second plurality of grooves to unlock the tool head for rotational movement relative to the handle.13. The tool of claim 9 wherein the splined cylinder moves from a locked position to an unlocked position in response to movement of the plunger.14. A splined pin assembly comprising:a plunger comprising a plunger aperture; a retainer comprising a slot, the retainer being configured for sliding engagement with the plunger; a splined cylinder comprising a splined cylinder aperture, the splined cylinder being configured for sliding engagement with the retainer; a pin sized substantially the same as the splined cylinder aperture and the plunger aperture, the pin being positioned within the splined cylinder aperture, the slot, and the plunger aperture; wherein the pin affixes the plunger to the splined cylinder; and wherein the retainer can be displaced relative to the plunger and the splined cylinder. 15. The splined pin assembly of claim 14 further comprising:wherein the displacement of the retainer is limited by the freedom of movement of the pin within the slot. 16. The splined pin assembly of claim 15 further comprising:wherein a spring positioned within the retainer exerts a force on the plunger and the retainer, keeping the plunger positioned away from the retainer in the absence of an opposing force. 17. The splined pin assembly of claim 16 further comprising:wherein a splined orifice on a tool head or a handle prohibits movement of the pin out of the plunger, the retainer, and the splined cylinder. 18. The splined pin assembly of claim 17 further comprising:wherein the splined cylinder comprises a plurality of splined portions; wherein at least two of the plurality of splined portions engage a tool head and at least one of the plurality of splined portions engage a handle when the splined pin assembly is in a locked position, thereby creating a plurality of shear points with respect to the handle, the splined pin assembly, and the tool head; and wherein the at least two of the plurality of splined portions do not engage the tool head when the splined pin assembly is in an unlocked position, thereby allowing the handle to rotate with respect to the tool head. 19. The splined pin assembly of claim 18 further comprising:wherein the retainer further comprises a flange and a retainer cylinder, the axis of the retainer cylinder being orthogonal to the plane of the flange; and wherein the slot extends through the wall of the retainer cylinder and wherein the long side of the slot is aligned with the axis of the retainer cylinder. 20. The splined pin assembly of claim 19 further comprising:wherein the splined cylinder aperture extends through the wall of the splined cylinder; wherein the plunger further comprises a planer member and a plunger cylinder, the axis of the plunger cylinder being orthogonal to the plane of the planer member; and wherein the plunger aperture extends through the wall of the plunger cylinder.