Making the beautiful effects of professional inlays isn't as difficult as it may seem if you start with the CMT Inlay Kit.Solid brass components come with either a solid carbide spiral bit or straight bit with 1/8" cutting diameter and1/4" shank. The interchangeable brass bushing and your own template design make it easy - just remove andre-assemble the small bushing to make the recess in the workpiece and cut out the inlay. See instructions includedwith the kit for complete details. The CMT Inlay Kit gives you unlimited decorative possibilities and is the perfecttool for toymaking, puzzle making and lettering ideas. Spiral bit recommended for use in MDF. Straight bits recommended for natural wood.