Material: Drill chuck converter made of high density material with good durability and high impact resistance, easy to use Adjustable: 1/2inch square or 1/4inch hexagonal fast load adapter and can be used with power tools : extended post for easy replacement of the bit and sleeve, stable clamping for easy operation Advantages: Hex shank socket adapter one-hand exchange is allowed during operation and the adapter securely holds any 1/4inch hex handle To use: Convert the air or power impact wrench into a drill or ratchet wrench into Type: 1/2-Inch Drive to 1/4-Inch Hex Suitable Bit: 1/4 inch Hex Shank colour:Black Material:steel size:Length: 50mm, Rear diameter: 12.5mm, Front diameter: 6.35mm Package Contents: 4 x Hex Shank Converter Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.