4 PCS SOCKET ADAPTER SET1/4” HEX SHANKPRODUCT DIMENSION:1/4 * 1/4 * 65mm length 1/4 inch shank can be converted to 6.35mm square head3/8 * 1/4 * 65mm length 1/4 inch shank can be converted to 9.4mm square head1/2 * 1/4 * 72mm length 1/4 inch shank can be converted to 12.6mm square headQuick release Socket Adapter1/2” female x 1/4” femaPRODUCT SPECIFICATIONS:Material: CrVColor: blackPRODUCT FEATURES:[PREMIUM MATERIAL] This drill bit extension set quick release socket adapters are made of premium highstrength chromevanadium steel, durable, sturdy, wearresistant, corrosionresistant, withstanding high pressure; [DIMENSION 3PCS SOCKET ADAPTER] 1/4inch driver adapter, 3/8inch socket adapter, and 1/2inch impact adapter, each with a 1/4 inch hex shank driver socket wrench adapter set .1/4inch 3/8inch 1/2inch bit adapter for impact driver turn any power drill into a power nut driver Sturdy springloaded ball bearing holds sockets securely in place Sockets SnapOn Tightly and Won't Slip Off. [QUICK RELEASE SOCKET ADAPTER] Socket Adapter: 1/2 Inch Square Female to 1/4 Inch Hex Female Securely holds any 1/4inch hexshank bit; Quickload and release mechanism provides onehanded bit loading lock; [WIDELYUSED]In installation of pneumatic screwdriver, electric screwdriver, pneumatic drill, manual screwdriver and other installation for the hexagonal tool . A musthave package for conversion. Great for DIY work, household maintenance, and most general repairs, not for industrial work. A great tool addition to any tool box set. [FINE WORKMANSHIP] Excellent surface coating provides extra protection from damage against elements and substances such as oil and fluids that may come in contact with the extension bars during use.