Works With 1/8" To 3/4", #1 To #30, A To Z And 3mm To 19mm Drill BitsUse To Hone Drill Bits To Their Original Sharpness, Extending Their Life And Improving Drilling AccuracyAdjustable For 5 Standard Drill Point AnglesIncludes Table For Translating The Overhang Requirement To The Correct Point Angle For The Target MaterialAutomatically Adjusts To The Correct Clearance AngleFor Use with ANSI, OSHA And UL Approved Electric Bench Or Surface Grinders