Heller HSS-Co Cobalt Twist Drills DIN 338 RN
- Heller 21229 8, This 4mm HSS-Co cobalt twist drill from Heller is equipped to tackle the toughest drilling jobs in stainless steel & metal. It is made from a special HSS steel with a 5% cobalt content. Sold singly. Heller 21229 8 0990 HSS-Co Cobalt Twist Drill DIN 338 RN 4.0mm
- Single