Cobalt drill bit

A high‑performance cobalt twist drill bit with an 8 mm diameter and a 117 mm total length. Designed for precision drilling in hardened steel and other tough materials, it features a cylindrical shank and DIN 338 RN threading for secure mounting.
Heller Tools 21243 4 HSS Metal twist drill bit, diameter 10mm, coated with cobalt for improved wear resistance, DIN 338 standard, suitable for drilling into steel.
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