136-3949, Dormer, Dormer HSS Drill Bit, 12.4mm Head, 3 Flute(s), 90°, 1 Piece(s), Brand Dormer, Head Diameter 12.4mm, Drill Bit Type Countersink, Countersink Angle 90° Dormer HSS Drill Bit, 12.4mm Head, 3 Flute(s), 90°, 1 Piece(s)