4-30mm 3 Pce Spiral Flute HSS Cobalt Step Drill Set or tweak the grind angles

or tweak the grind angles

Our range features a uniquely engineered torsion zone with multi-stage hardening and tempering to dissipate damaging peak loads

Tru-plate fully hardened and tempered steel body is precision balanced to run truer

decorative copper

4-30mm 3 Pce Spiral Flute HSS Cobalt Step Drill Set or tweak the grind angles4 30mm 3 Pce Spiral Flute HSS Cobalt Step Drill Set HSS Co5 (Cobalt) Titanium Aluminium Nitride Coated (TiAlN) Spiral Flute Step Drill Set Bordo Cobalt Spiral Flute Titanium Aluminium Nitride (TiAlN) coated step drills offer unparalleled performance when drilling hard metals such as stainless steel. HSS Co5 material provides increased performance and tool life when machining tough steels. Bordo step drills are ideal for electrical contractors,