Drill Bit Aircraft Extension 7/16"

Used For Drilling Holes In Most Ferrous & Non-ferrous Metals, Wood & Plastics. Made From M2 Steel, The Highest Grade Of High Speed Steel & Is The Best For Durability & Maintenance Of Cutting Edge. Heat Treated To Give The Drill Bit Added Durability & Extend Bit Life. Sizes 3/16" & Over Have Three Flats Put On The Shank To Give The Drill Chuck A Tighter Grip To Prevent Slippage Under Heavy Loads. Manufactured w/ A 135 Degree Split Point To Instantly Grab The Work Surface Eliminating The Need To Start The Hole w/ A Center Punch. Split Points Create A Cleaner Cut.