Drillco 300LH11 Cobalt Bronze Oxide Screw Drill Bits Set 11 PC

Drillco 300LH11 Cobalt Bronze Oxide Screw Drill Bits Set 11 PC

M42 Cobalt High Speed Steel for super abrasive resistance in tough metals. Used in left hand screw machines and with screw extractors. Can be used to drill out broken bolts and other hardened fasteners. 11pc set in rollup pouch.

Product Features

• Made with premium grade cobalt HSS to drill harder materials
• Cobalt drills can drill approximately 30% faster than HSS drills
• Self centering 135° split-point for reduced thrust requirements and minimized walking
• Left handed flutes and cutting edges allow for counter-clockwise drilling
• Bronze surface treatment for high lubricity
• Shorter screw machine length adds rigidity to the drill bit to reduce breakage
• 3-flats shank for reduced slippage in drill chucks
• Made in USA

Applications

• Counterclockwise drilling for easy removal of broken bolts