1 Pc. The Best Quality Brand New 15/16" x 3" (Depth) High Speed Steel Mag Drill Annular Hole Cutter Annular Cutters 3/4" shank diameter with two flats Cutters are interchangeable with other standard hole cutting systems High Speed Steel Fully Ground Flutes - Better chip ejection ID Taper - Clearance for improved slug ejection CNC manufacturing technology - Consistent cutter geometry, cutter to cutter Lower cost per hole Better finishing More accurate, cleaner hole longer tool life (can be re-sharpened)