DIMENSION: - 1/4" drive adapter, 3/8" drive adapter, and 1/2" drive adapter, each with a 1/4 inch hex shank driver socket wrench adapter set .1/4" 3/8" 1/2" socket extension turn any power drill into a power nut driver;WIDELY-USED: - Widely applied to pneumatic screwdriver, electric screwdriver, pneumatic drill, manual screwdriver, air drill and other installation for the hexagonal tool . A must-have 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: - The 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.PREMIUM MATERIAL: -1/4 hex shank socket adapters are made of heavy-duty chrome-vanadium steel, reliable, sturdy, withstanding high pressure; 360 DEGREE ROTATABLE: -360 degree rotatable socket adapter adopts a special spherical design, which can evenly distribute the torque load on a greater surface area; Allow access to a narrower workplace, convenient to use, effort-saving, significantly improves work performance; These socket adapters are designed for impact use, featured with spring-loaded detent balls to hold sockets securely in place. Sockets Snap-On Tightly and Won't Slip Off. A must-have tool set in your tool box;