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Black Oxide drill bits are manufactured from industrial high speed steel, surface treated fro high performance and long life. Designed to drill common steel (flat bar, angle iron, tubing), wood and plastic. No center punch need, Century Quick Cut Points are self centering and penetrate faster with less pressure, will not walk or wander a the starting surface. Manufactured to Aerospace NAS 907-B specifications.<br><br>

Century Drill 24418 - Black Oxide Drill Bit - 135&#176; - 9/32 x 4-1/4&quot;

24418-black-oxide-drill-bit-135-9-32-x-4-1-4

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