MASTER SET: ¼”, 3/8” & 1/2” drive std, deep sockets; star, E-star, stubby triple square, tamperproof star, std, long & stubby hex bit sockets, U-joints, extensions, adapters. Sockets: 4–30mm, 3/16"–1-1/2"; Bits up to 19mm, 3/4", T55, E16, T50H, & M16. CR-MO ALLOY STEEL: Crafted from premium chrome molybdenum alloy steel, these sockets deliver maximum strength, durability, and impact resistance, making them ideal for demanding jobs in professional and industrial settings. RADIUS CORNER DESIGN: The sockets are designed with a radius corner to improve fastener engagement, minimize rounding, and reduce wear on both the tool and fasteners, extending their lifespan and reliability. DUAL SIZE MARKINGS: Each socket features high-visibility laser markings and permanent stamped markings, ensuring quick, accurate size identification even after prolonged use or in low-light conditions. VERSATILE BIT SOCKETS: Features impact bit sockets including star, E-star, stubby triple square, stubby tamperproof star, and standard, long and stubby hex bit sockets for any job.