[QUALITY]: Premium S2 Steels Bits that reduce wear-outs and resists rust for maximum longevity. [TORQUE]: Heavy Duty Cr-V Sockets for greater torque and turning power. [CONVENIENT]: 6 in. Extra Long Bits for narrow, recessed, deep, or other hard to reach areas. [SECURE]: Meets or exceeds all ANSI standards to assure the highest level of performance and safety. [SIZES]: 3/8 in. Drive with 3, 4, 4.5, 5, 5.5, 6, 7, 8, 9, 10mm bits.