drill bits & sets
mountain mtn55407 . 11 inch black oxide drill bit 2 pack
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 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 size 7 64 sku isn15000
mountain