Irwin 39109 9/16-Inch by 18-Inch Installer Twist Drill Bit

Irwin 39109 Power Drill Installer BitsIrwin 39109 Power Drill Installer Bits Features:; Constructed of premium alloy steel for boring into a variety of materials including wood, plaster, and metal lath; Special 82 degree point for fast boring; Wire hole at the tip of the bit makes it easy to pull wire through walls, ceilings, and floors; Ideal for installation of small wire for telephones, cable, TV, computers, and security systems; Diameter: 9/16"; Shank Size: .370"; Overall Length: 12"; For installing all types of small wire in homes, offices, garages, etc; Special 82º point for fast boring; Hole in flute (head) makes it easy to pull wires through hole in wall; Boring action is faster, smoother, cleaner in plaster, metal lath, most every material encountered in wiring installations; Special flute finishing process assures quick chip removal, no clogging, no binding