ITEM NAME:2pcs 5 Flute Countersink Drill Bit HSS 82 Degree Point Angle Chamfer Cutter #gib Store Home Promotion Hot Item Add to Fav.2pcs 5 Flute Countersink Drill Bit Round Shank HSS 82 Degree Point Angle Chamfer Chamfering Cutter for Woodworking. The ideal choice of chamfer and counters hole. 2 x Countersink Drill Bits. Specification: 1/2" (12.7mm) round handle, 5/8" (15.9mm) round handle, chamfering angle 82 degrees.