Set of 6pcs HSS conical countersinks angle 90 °.

Set of 6 pcs conical countersinks made of HSS Co 66 HRC steel, angle 90 Countersink diameters fi: 6,3 ; 8,3 ; 10,4 ; 12,4 ; 16,5 ; 20,5 mm High-strength precision tapered countersinks for making notchless tapered countersinks. The 3 cutting edges ensure stable operation and high performance. Countersinks are used for countersinking, deburring, chamfering. They are designed for: machinable steels, cast iron, alloy steels, aluminum, stainless steels.