Description
Step drill with 90° included step angle, straight shank and a drilling-pilot diameter of 4.50mm with a length of 11.00mm, a large diameter of 9.00mm and an overall length of 84mm, according to DORMER standard to produce a medium fit through hole and conical seat for M4 countersunk-head screws, HSS and steam tempered finish for machining free machining, plain carbon and alloy steel, ferritic and martensitic stainless steel and grey cast-iron
