The Dormer Countersink set is available in cylindrical plastic drum. Sets containing a variety of sizes of different 90 degree countersinks. Countersink set in Dial A Tool container consisting out of 6 G506 countersinks, It includes a diameters of 6.30, 8.30, 10.40, 12.40, 16.50, and 20.50mm. Suitable for many materials
HSS with standard bright finish
For ISO metric countersunk head screws
DIN 335 C standard to produce a conical seat