Power Hand Tools Sockets Adapter sets, Hex Square Nuts Driver Drill Impact Socket Extension Bit Adapter Socket Wrench Adapter Set 1/4" 3/8" 1/2" drive. 1/4-inch Hex Shank Prevents Stripping During High Speed Drill Operation. Material: High Quality 6150. Detent ball on each adapter for socket retention Suitable for a screwdriver or electric screwdriver handle tools (hexagonal hole or three-jaw chuck can) drive sleeve and after use can be installed on the size of the original hexagonal polygons converted to square head size, which can be used to install the sleeve is a good accessory to convert. Adapts sockets to power drills and drivers. Super Strong Heat Treated Chrome Vanadium Steel for Normal & Impact Includes 1/4"(Length 65mm), 3/8"(Length 65mm) and 1/2"(Length 72mm) drive impact grade adapters. Converts All Power Drills into Speedy Socket Drivers.