Mountain 21/64" Black Oxide Drill Bit - Mountain

Features and Benefits:

• 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.