About this item SPECIFICATIONS The Impact Grade Socket Adapter Set Includes 3 Adapters in a Pack: 1 x 1/4-inch Hex to 1/4-inch Drive, 1 x 1/4-inch Hex to 3/8-inch Drive, 1 x 1/4-inch Hex to 1/2-inch Drive. So you can turn any power drill into a power nut driver with the extra reach you need. Impact Grade These impact grade corrosion-resistant adapters are perfect for increased torque projects, helping to prevent the breaking and stripping of sockets. High Quality Each adapter is made of Heat-treated Chrome Vanadium Steel, and coated in Manganese Phosphate for industrial or mechanical use and meets or exceeds ANSI/ASME standards. Compatibility The impact driver socket adapters are compatible with all brands of power drills, and the spring loaded detent ball design ensures the adapters to work securely with 1/4-inch, 3/8-inch, or 1/2-inch drive sockets.