Mountain 55410 Mountain 5/32in Black Oxide Drill Bit
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.