Draper Expert 1/8&quot Cobalt Twist Drill Bit Draper Expert 1/8&quot Cobalt Twist Drill Bit

Expert Quality, a selection of imperial-sized high speed steel straight shank drills (with 5% cobalt). The addition of cobalt to HSS adds strength and wear resistance for longer life. *For use with UNC and UNF Helicoil&#174 Thread Repa...

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