IRWIN Flexible Shank Installer Drill Bit with Screw Tip - 1/2-Inch Shank, 36-Inch Length - brand new in package - $45 firm PRODUCT FEATURES: - Screw tip with aggressive pitch delivers easy starts and fast drilling - Hole in flute for easy wire pulling through walls, ceilings and floors - 3-flatted shank prevents slipping in drill chuck and includes hole for wire pulling - Tapered flute for faster chip ejection, less binding, and smoother drilling