With 4.2mm diameter , this EXTREME Cobalt metal drill bit, deliver superior drilling into metal.Featuring a non slip shank, a no-walk tip for curved surfaces and a strong central core that improves fracture stability, particularly in freehand use (4.8mm diameter and up).
5% cobalt alloyed High Speed Steel
Unique tip improves efficiency and eliminates walking
Working Length [Metric]
Number of Pieces
Is it a Set
Product Length [Metric]