Century Drill 24228 - Black Oxide Drill Bit - 135° - 7/16 x 5-1/2" 24228

Century's pro-grade black oxide usa made black oxide drill bits are manufactured from industrial high speed steel surface treated for high performance and long life. M2 grade steel for drilling common steel flat bar angle iron tubing wood and plastic. No center punch needed century 135 quick-cut points are self centering and penetrate faster with less pressure will not walk or wander at the starting surface. Manufactured to aerospace nas 907-b specifications. Manufactured from industrial high speed steel surface treated for high performance and long life. M2 grade steel for drilling common steel (flat bar angle iron tubing) wood and plastic. No center punch needed century's 135 quick-cut points are self-centering and penetrate faster with less pressure. Drill bit will not "walk" or "wander" at the starting point. Manufactured to aerospace nas 907-b specifications. Made in the u.S.A.

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