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Cobalt drills are designed to cut through extremely hard metals, including stainless steel. No center punch needed, Century 135 degree Quick Cut Points are self centering and penetrate faster with less pressure, will not walk or wander at the starting surface. Extremely heat resistant, must be used and operated in power units that have a RPM speed of 1.500 or more maximum efficiency. Aerospace NAS 907-J specifications.<br><br>

Century Drill 26220 - Cobalt Drill Bit - 135&#176; - 5/16 x 4-1/2&quot;

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