Draper Expert 33/64&quot Cobalt Twist Drill Bit for Helicoil Thread Repair Kits Draper Expert 33/64&quot Cobalt Twist Drill Bit for Helicoil Thread Repair Kits

Expert Quality, a selection of imperial-sized high speed steel straight shank drills (with 5% cobalt) for specifically drilling out damaged threads prior to insertion of a Helicoil&#174 insert. The addition of cobalt to HSS adds streng...

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