Alpen Cobalt HSS Stub Drill Bit 4.0 mm – Short Length

The Alpen Cobalt HSS PZ-Cobalt stub drill bit is a short-length precision drill designed for high-speed drilling in steel, stainless steel, and cast iron. With a 4.0 mm diameter and 55 mm overall length, the cobalt content provides superior heat resistance and extended tool life compared to standard HSS bits. Ideal for electrical panel drilling, machinery installation, and general metalworking applications.