IRWIN Tools 4935643 Black Oxide Metal Index Drill Bit Set, 12pc 10000 PSI Cro-Mo mandrels provide superior toughness

Cro-Mo mandrels provide superior toughness and resistance to fatigue

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OEM Part Number : 57030

It includes 1 terrycloth bonnet and 1 synthetic wool bonnet

This thread chaser will quickly restore threads to near original condition without the use of expensive thread-cutting equipment

IRWIN Tools 4935643 Black Oxide Metal Index Drill Bit Set, 12pc 10000 PSI Cro-Mo mandrels provide superior toughnessThis IRWIN 12 Piece Black Oxide Hex Shank Drill Bit Set features drill bits with a 135 split point tip to start drilling quickly with minimal walking. Each step drill bit is engineered with high speed steel with a black oxide coating for corrosion resistance. The 1 4 inch hex shank works in most Lock n Load quick change extensions as well as virtually any drill chuck. Applications include automotive, maintenance and repair, portable drills and