These are the finest bits we've ever found for today's taxidermist. 1/8" shafts will work in most rotary tools like the Dremels and other brand tool. These great bits will last forever and not wear out under even the harshest conditions. The Kutzall coatings consists of hundreds of extremely sharp tungsten carbide edges, designed to quickly and efficiently remove stock, while providing many times the life of conventional steel tools. Our unique coating also resist loading, but can easily be cleaned with solvent or burned clean with a gas torch. Shaft Size: 1/8"