Innovative pressed carbide tip with aggressive cutting angles for faster drilling and longer bit life. One-piece construction withstands higher torque loads than standard quick-change bits. Black oxide finish resists corrosion and increases life of bit. Quick-change shank is designed to work with impact drivers, and reduces slipping in standard drill chucks. Set includes (1) 5/32′, (2) 3/16′, (2) 1/4′ bits.