G10720.5 Countersink with hexagonal shank - 90°

Countersink with 3-flutes, 90° chamfering angle, maximum diameter 20.50mm with an overall length of 50mm and 1/4" hexagon drive, according to DORMER standard to produce a conical seat for ISO Metric countersunk-head screws with a minium hole diameter of 3.50mm, cobalt based HSS-E with standard bright finish for machining steel and cast steel, copper or copper alloys