General description The 3pcs Impact Universal Joint Socket Set is designed for versatility and ease of use in tight spaces. Made from high-quality chrome vanadium steel, this set includes three flexible sockets in sizes 1/4", 3/8", and 1/2", allowing for efficient access to hard-to-reach areas. Technical specifications Color: Chrome Silver Material: CR-V Chrome Vanadium Steel Diameter: 1/4" (6.3mm), 3/8" (10mm), 1/2" (12.5mm) Total Length for Each: 41mm (1/4"), 55mm (3/8"), 73mm (1/2") Usage Spring-loaded ball bearing head securely holds rings/extensions Locks onto ratchet or extension bar for stability Facilitates easy access in difficult areas