HSS-Co5 Cobalt Jobber Drill Bits | Metric & Imperial | Packs of 10 | Castlebrook

HSS-Co5 Cobalt Jobber Drill Bits

When ordinary HSS bits struggle, Castlebrook's HSS-Co5 Cobalt Jobber Drill Bits step up. Engineered with 5% cobalt for superior heat resistance, these bits cut faster, last longer, and tackle the toughest materials on site — from stainless steel and hardened alloys to cast iron and hard plastics.

Key Features

• HSS-Co5 Cobalt Construction — 5% cobalt content delivers increased heat resistance and cutting performance under demanding conditions
• 135° Split Point — Precision split point for accurate centring without the need for a centre punch, reducing walking and improving hole accuracy
• Ground Flute — Precision-ground flutes for smoother chip evacuation and a cleaner, more consistent finish
• Full Metric & Imperial Range — Available in a comprehensive range of sizes to suit every application
• Longer Tool Life — Cobalt alloy construction means fewer bit changes and lower cost per hole

Suitable For

• Stainless steel
• Hardened alloy steel
• Cast iron
• Hard plastics

A must-have for engineers, fabricators, and tradespeople who demand precision and durability from their tooling.