Black Oxide treated for wear resistance and greater lubricity
Made from premium grade high speed steel
135 degree split point
Designed to drill common steel (flat bar, angle iron, tubing), wood and plastic
Manufactured to Aerospace NAS 907-B specifications
Black Oxide drill bits are manufactured from industrial high speed steel, surface treated for high performance and long life. Also no center punch needed: Mountain Quick-cut points are self centering and penetrate faster with less pressure, will not "walk" or "wander" at the starting surface. Made in the USA.
