Premium grade HSS Counterbores with straight shank & pilot.
For producing countersinkings for cylindrical head screws, thread-cutting screws Ideal for burr- and chatter-free deburring and countersinking.
Suitable for use on structural grade steels, cast iron & non-ferrous metals.
Suitable for use with any 1/2" chuck. Can be fitted into appropriate Weldon Adapter for use with variable speed Magnetic Drills.
Best results at low cutting speeds.
Conform to DIN 373