The Klein ProFlex Impact-Rated Ratcheting T-Handle was designed for the professional tradesman and do-it-yourself enthusiasts. Set includes 9 standard bits, 12 extended bits, impact bit holder and ratcheting T-Handle. The bits are made of high-impact rated S2 steel and feature an optimized torsion zone that absorbs impact forces to increase the lifetime of the bit. The adjustable length T-Handle easily holds bits and fasteners in place.