Drillco 300LH11 11 Piece Cobalt Left Hand Screw Machine Length Drill Set 135 Deg Split Point

Constructed Of M-42 Cobalt High Speed Steel For Super Abrasive Resistance In Tough Metals. They Are Used In Left Hand Screw Machines And With Screw Extractors. Can Be Used To Drill Out Broken Bolts And Other Hardened Fasteners. Sizes 3/16″ And Above Have A 3-Flat Shank Which Reduces Slippage In The Drill Chuck.