Drill Doctor XPSharpens standard twist and masonry bits from 3 32" to 1 2" (optional 3 4" chuck available) Sharpens to a 118 degree point angle Sharpens Carbide, Cobalt, High Speed Steel, Black Oxide, TiN Coated, twist and Masonry bits Longer chuck jaws hold bits more precisely, and jaw guides eliminate jaw twisting on small bits Able to create and sharpen split point bits. "Push to Stop" drill point splitting port: prevents over splitting the bit point Permanent