1/4 IN Quick Change technology. Professional grade driver bits. Titanium Nitride coated self-centering high speed drill bits. High quality shock resistant case stays intact even after accidental drops. Hammer drill rated carbidegrade tips and hardened shankmasonry drill bits. Hardened forged magnetic nut drivers fit most TapCon fasteners. Quick release chuck with precise fit. Includes security bits that fit most security fasteners frequently used in public facilities.