Faithfull hss countersinks (high speed steel)High Speed Steel Rosehead Countersink, for countersinking screw holes for flush fitting of screw heads in wood, plastics and non-ferrous metals be used in both hand tools and power drills. Rosehead. 5/8in – 16mmth: 1. 5/8in – 40mmk diam: 1/4in – 6mm.
