Irwin® straight shank wood installer bits feature an 82 deg point for fast, smooth drilling in wood. These bits are made with a hole in the flute for easy wire pulling through walls, ceilings and floors. They have a 3-flatted shank to prevent slipping in drill chucks and the shank also includes a hole for wire pulling. Plus, they are made from premium high carbon steel for extended drilling life in wood. Irwin® Wood Installer Bit, Drill Style: Installer, 5/16 in Diameter, 18 in Overall Length, 3-Flat/Straight Shank, High Carbon Steel Cutting Edge, HSS