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A tool apparatus comprises an operative member and a handle connected to the operative member. The handle comprises a core element having an elongated body, an outer surface and first and second ends opposite to each other. At least the second end is connected to the operative member. The tool handl

A tool apparatus comprises an operative member and a handle connected to the operative member. The handle comprises a core element having an elongated body, an outer surface and first and second ends opposite to each other. At least the second end is connected to the operative member. The tool handle also comprises at least one cavity extending inwardly from the outer surface of the core element and a plurality of insert blocks selectively receivable in the cavity. The tool handle further comprises an overlay disposed on the core element, wherein a height of the projection on exterior surface of the insert block is no less than a thickness of the overlay, thereby exposing the upper surface to an external environment so as to be visible to a viewer.

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1. A tool handle assembly system for assembling a plurality of tool handles, wherein each tool handle is configured to be connected to an operative member to form a tool apparatus, the tool handle assembly system comprising: a plurality of identical core elements each including an elongated body, an

1. A tool handle assembly system for assembling a plurality of tool handles, wherein each tool handle is configured to be connected to an operative member to form a tool apparatus, the tool handle assembly system comprising: a plurality of identical core elements each including an elongated body, an outer surface, and first and second ends opposite to each other, at least the second end being adapted to connect to an operative member of the tool apparatus;at least one cavity extending inwardly from the outer surface of each core element; anda plurality of insert blocks selectively insertable in the cavity, each insert block including: an exterior surface that divides the insert block into an inner portion insertable in the cavity and an outer portion that extends outwardly beyond the outer surface of the core element when the insert block is received in the cavity, andthe outer portion having at least one projection extending from the exterior surface away from the inner portion, the at least one projection having an outline of perimeter in a form of at least a part of desired indicia that convey predetermined information relating to the respective tool apparatus,wherein the inner portions of the insert blocks have an identical dimension,wherein the plurality of insert blocks include various indicia that convey various predetermined information,wherein each cavity of the identical core elements selectively receives an insert block to form various tool handles that includes various indicia respectively, andwherein when viewed from above the exterior surface of each of the insert blocks, a total area defined by the outer portion of each of the insert blocks is smaller than an area of the exterior surface of the respective insert block. 2. The tool handle assembly system of claim 1, wherein each cavity retains a respective insert block by interference fit connection, snap fit connection, adhesives, or combination thereof. 3. The tool handle assembly system of claim 1, wherein each core element includes two or more cavities for receiving insert blocks, respectively. 4. The tool handle assembly system of claim 1, wherein the predetermined information is one selected from the group consisting of a predetermined flexibility of a respective operative member, a predetermined name of a company, a predetermined brand for a respective tool apparatus, a predetermined size of a respective operative member, and a predetermined function of a respective operative member. 5. The tool handle assembly system of claim 4, at least a portion of an outer surface of a tool handle exposed to a viewer has a predetermined color that conveys predetermined information. 6. The tool handle assembly system of claim 5, wherein an insert block including indicia that convey the same predetermined information as the predetermined information conveyed by the predetermined color is selected to insert into the respective cavity. 7. The tool handle assembly system of claim 5, wherein an insert block including indicia that convey different predetermined information than the predetermined information conveyed by the predetermined color is selected to insert into the respective cavity. 8. The tool handle assembly system of claim 5, wherein a tool handle further comprises a free end, a collar portion that terminates the second end of the respective core element, and an aperture adjacent the first end of the respective core element, the portion of the outer surface of the tool handle that is exposed to the viewer is a surface of at least one selected from the group consisting of the free end, the collar portion and a wall of the aperture. 9. The tool handle assembly system of claim 1, wherein a free end of the respective tool handle is in a form selected from the group consisting of a soft end, a hammer cap end and a plastic cap end. 10. The tool handle assembly system of claim 1, wherein the at least one projection comprises a letter, a cutout being formed in a stroke of the letter, the cutout being exposed to the exterior surface of the corresponding insert block. 11. The tool handle assembly system of claim 1, wherein the inner portion of each of the insert blocks includes an elongated body that has a first end and a second end opposite to each other, when viewed from above the exterior surface of each of the insert blocks, at least a portion of the inner portion of the respective insert block being tapered when extending toward the second end. 12. A tool handle assembly system for assembling a plurality of tool handles, wherein each tool handle is connected to an operative member to form a tool apparatus, the tool handle assembly system comprising: a plurality of identical core elements each including an elongated body, an outer surface, and first and second ends opposite to each other, at least the second end being adapted to connect to an operative member of the tool apparatus;at least one cavity extending inwardly from the outer surface of each core element; anda plurality of insert blocks selectively insertable in the cavity, each insert block including: an exterior surface that divides the insert block into an inner portion insertable in the cavity and an outer portion that extends outwardly beyond the outer surface of the core element when the insert block is received in the cavity, andthe outer portion having at least one projection extending from the exterior surface away from the inner portion, the at least one projection having an outline of perimeter in a form of at least a part of desired indicia that convey predetermined information relating to the respective tool apparatus,wherein the inner portions of the insert blocks have an identical dimension,wherein the plurality of insert blocks include various indicia that convey various predetermined information,wherein each cavity of the identical core elements selectively receives an insert block to form various tool handles that includes various indicia respectively, andwherein each cavity includes a protrusion portion extending toward an opening of the cavity and the respective insert block includes a receptacle for receiving the protrusion portion. 13. An insertion device to be inserted in a cavity defined in a handle of a tool apparatus, comprising: an insert portion;a cover portion including an elongated body that has an exterior surface, first end and second end opposite to each other, and two sides parallel to each other in the vicinity of the first end and tapered toward the second end; andat least one projection extending from the exterior surface away from the inner portion, the at least one projection having an outline of perimeter in a form of at least a part of desired indicia that convey predetermined information relating to the tool apparatus,wherein the insert portion has a smaller perimeter than the cover portion such that a perimeter recess is formed between the insert portion and the cover portion. 14. A tool apparatus, comprising: an operative member;a handle connected to the operative member, the handle comprising:a core element having an elongated body, an outer surface, and first and second ends opposite to each other, at least the second end being connected to the operative member;at least one cavity extending inwardly from the outer surface of the core element;an insert block receivable in the cavity, the insert block having an exterior surface that divides the insert block into an inner portion adapted to be received in the cavity and an outer portion adapted to extend outwardly beyond the outer surface of the core element when the insert block is received in the cavity; andat least one projection extending from the exterior surface away from the inner portion, the at least one projection portion having an outline of perimeter in a form of at least a part of desired indicia that convey predetermined information relating to the tool apparatus, the at least one projection including an upper surface; andan overlay disposed on the core element, a height of the at least one projection formed on the exterior surface of the insert block being no less than a thickness of the overlay, thereby exposing the upper surface of the at least one projection to an external environment so as to be visible to a viewer,wherein when viewed from above the exterior surface of the insert block, a total area defined by the outer portion of the insert block is smaller than an area of the exterior surface. 15. The tool apparatus of claim 14, wherein at least a portion of an outer surface of the handle exposed to the viewer has a predetermined color that conveys predetermined information. 16. The tool apparatus of claim 15, wherein the predetermined information conveyed by the predetermined color is the same as the predetermined information conveyed by the indicia formed on the insert block. 17. The tool apparatus of claim 14, wherein the predetermined information indicates a predetermined flexibility of the operative member. 18. The tool apparatus of claim 17, wherein the upper surface of the at least one projection has a predetermined color that has a relationship to the predetermined flexibility of the operative member. 19. The tool apparatus of claim 18, wherein the predetermined color is selected from a group of colors consisting of red and blue, where red indicates a blade flexibility that is less than a blade flexibility indicated by blue. 20. The tool apparatus of claim 14, wherein the predetermined information indicates a predetermined function of the operative member. 21. The tool apparatus of claim 14, wherein the inner portion of the insert block includes an elongated body that has a first end and a second end opposite to each other, when viewed from above the exterior surface of the insert block, at least a portion of the inner portion being tapered when extending toward the second end. 22. A method for assembling a plurality of tool handles, each tool handle is adapted to connect to an operative member of a tool apparatus, comprising: fabricating a plurality of identical core elements each including an elongated body, an outer surface, and first and second ends opposite to each other, each core element having at least one cavity extending inwardly from the outer surface of the core element;fabricating a plurality of insert blocks, each insert block including an exterior surface that divides the insert block into an inner portion insertable in a respective cavity and an outer portion extending outwardly beyond the outer surface of a respective core element when the insert block is received in the respective cavity, the outer portion having at least one projection extending from the exterior surface away from the inner portion and having an outline of perimeter in a form of at least a part of desired indicia that convey predetermined information relating to the respective tool apparatus, wherein various indicia are formed on various insert blocks to convey various predetermined information, the at least one projection including an upper surface;selecting an insert block that conveys a certain predetermined information; disposing the insert block in a respective cavity so that the exterior surface of the insert block is leveled with the outer surface of the respective core element; and fabricating various tool handles including various indicia respectively by assembling the various insert blocks with the identical core elements,wherein fabricating a plurality of insert blocks includes: forming the outer portion of each of the insert blocks such that when viewed from above the exterior surface of each of the insert blocks, a total area defined by the outer portion of each of the insert blocks is smaller than an area of the exterior surface of the respective insert block. 23. The method for assembling a plurality of tool handles of claim 22, further comprising covering a core element and the respective insert block with an overlay, a height of the at least one projection formed on the insert block being no less than a thickness of the overlay, thereby exposing the upper surface of the at least one projection to an external environment so as to be visible to a viewer. 24. The method for assembling a plurality of tool handles of claim 22, wherein each core element includes two or more cavities. 25. The method for assembling a plurality of tool handles of claim 22, wherein the plurality of insert blocks have identical inner portion so as to be interchangeable with each other for engagement with cavities. 26. The method for assembling a plurality of tool handles of claim 22, wherein the predetermined information is one selected from the group consisting of a predetermined flexibility of a respective operative member, a predetermined name of a company, a predetermined brand for a respective tool apparatus, a predetermined size of a respective operative member, and a predetermined function of a respective operative member. 27. The method for assembling a plurality of tool handles of claim 22, further comprising selecting an insert block that includes indicia that convey the same predetermined information as predetermined information conveyed by a predetermined color, wherein the predetermined color is shown by a portion of an outer surface of a respective tool handle that is exposed to the viewer. 28. The method for assembling a plurality of tool handles of claim 22, wherein fabricating a plurality of insert blocks including: forming the inner portion of each of the insert blocks such that the inner portion of each of the insert blocks includes an elongated body that has a first end and a second end opposite to each other, when viewed from above the exterior surface of each of the insert blocks, at least a portion of the inner portion of the respective insert block being tapered when extending toward the second end.