Norseman 166 Aircraft Drill Bit, 6in, 135° Split Point, Solid Construction, Black Oxide, Wire Size 21

Norseman 166 Aircraft Drill Bit, 6in, 135° Split Point, Solid Construction, Black Oxide, Wire Size 21

Heavy-duty 135° split point high-speed steel drills used for drilling holes in hard to reach places. Type 166 - NAS 907B, The black surface treatment prevents chip welding and increases abrasion resistance