by Precision Twist Drill
Buy new: $4.16
(Visit the Best Sellers in Twist Bits list for authoritative information on this product's current rank.)
Precision Twist Drill Metric Cobalt Drill Bits have a self-centering 135 Degree split point that penetrates faster than other point styles, produces smaller chips for better chip flow, and won't walk or skid when starting a hole.Their nitro-carburized surface treatment improves lubricity and wear resistance. Cobalt steel drill bits have better heat and abrasion resistance for drilling high tensile-strength materials and materials that get harder during machining.
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