3 Flute 90degree HSS 6542 Countersink Chamfering

Specification : 4.5mm、6.3mm、8.3mm、10.4mm、12.4mm、16.5mm、20.5mm、25mm、30mm、35mm、40mm、45mm、50mm。 ​ ​Material: HSS（6542/M2） ​ ​Shank: round handle ​ ​Color: as picture shows ​ ​Quantity: 1PC / 3 flute countersink drill ​ ​Uses: used in the hole of the workpiece 90 degrees chamfer or taper. ​ ​You can complete cone processing for small amount of cutting machining