Capacity: 2-13mm / 0079" - 0512"Mount: 1/2-20UNFThread Hole Diameter: 127mm/ 1/2"Drill Chuck Outer Diameter: 41mm/ 1 5/8"Drill Chuck Length: 75mm/ 3"Color: Black & Silver ToneMaterial: Metal, Plastic;Net Weight: 240g;High precision 1/2 x 20 spindle thread and tapered hole;Ergonomically designed with plastic sleeves that eliminate the possibility of rust;The "click" locking mechanism maintains the grip and avoids possible slip of the during hammer drilling or while screwing/unscrewing;Ideal for portable hand held drilling machines, and works well for hammer drilling and screwdriver operations.Package Content: 1 x Keyless Drill ChuckNote: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.