Heat treated tool steel countersinks with a HSS drill.Adjustable for different length screws and can produce a 9.5mm (3/8 inch) diameter or 12.7 mm (1/2 inch diameter counterbored ... read on
Trend Snappy TCT Countersink Set - 5 piece setA 5 piece set for all your countersinking and piloting needs covering Imperial screw gauges from No4 through to No12.Comprises 1 x 2.0... read on