【Socket Adapter Set】The set includes 11 HEX shank Socket Adapter Extension Bits (1/4" Dr * 25mm-30mm-50mm-65mm-150mm, 3/8" Dr * 50mm-65mm-150mm, 1/2" Dr * 50mm-72mm-150mm), 3 universal joints (1/4", 3/8", 1/2"), 4 Reducers (1/4"F x 3/8”M, 3/8”F x 1/4”M, 3/8”F x 1/2”M, 1/2“F x 3/8”M) and 3 Impact Couplers (1/4", 3/8", 1/2"). 【Premium Material】Built with heat-treated CR-V steel for extensions and adapters, and CR-MO steel for swivel joints and impact couplers, this set delivers durability under high torque. The black manganese phosphate finish provides excellent corrosion resistance, making it a reliable impact socket set for tough jobs. 【Quick Release & Secure Fit】Chamfered edges and spring-loaded detent balls on all heads ensure a firm socket connection and prevent drop-off during operation. Adapter ends feature impact holes for compatibility with power tools. The 3 CR-MO Impact Couplers have a quick-release design for fast, impact-resistant changes. 【Versatile for Multiple Applications】Perfect for mechanics, DIYers, and professionals.This high-quality set covers the tools and sizes needed for most tasks. Extension Bits reach tight spaces, swivel joints provide angled access, socket adapters allow use across drive sizes, and couplers convert drills for bolt installation and removal. 【Easy Storage & Identification】 Each tool features clear laser-etched size markings for quick selection. Organized in a durable XPE foam tray, the set fits easily in your toolbox or cabinet—saving time and keeping your workspace tidy., Manufacturer: EZARC