Jeweler's slitting saws are small, circular, metal cutting saw blades that are used for maching thin slots. The Sherline slitting saw holder is designed to mount is designed to mount jeweler's slitting saw blades with 1/2" diameter mounting holes. The slitting saw holder has a #1 Morse taper and mounts directly into the spindle. A drawbolt and thrust washer are also included. Note: Cutting fluid is helpful.