The Donek Tools Drag Knife is an innovative tool that can be used to cut almost anything that you can cut with a conventional Stanley type knife. The Donek knife system takes advantage of the speed and accuracy of a CNC controlled system. Please see the Donek Website http://donektools.com/ for more information...
D3 Drag Knives are optimized for detailed work in thinner materials with a depth of cut from 0.010 in. to 0.0625 in. (1/16 in.) thick. Curved cuts as small as 1/16 in. radius are possible with these tools.
The D3 fits in a 1/4in collet.
D4 Drag Knives can handle thicker materials from 0.010 in. up to 0.250 in. (1/4 in.) thick. Curved cuts as small as 1/8 in. radius can be made with this tool.
The D4 fits in a 1/4in collet.