This drill chuck has unique locking function, traditional locking methods, back having ratchet teeth, the locking pieces mounted on the rear sleeve, more effective in preventing work loose off, so that the clamp chuck,more reliably support tools. Instantly convert impact driver to hold non- drill & driver bits. Easily locks onto and drill bits. Feature - ColorSilver - Material: Alloy - Size: 5.10X1.70X1.70cm/2.00X0.67X0.67in - Keyless chuck easily locks onto and drill bits. Instantly convert impact driver to hold non- drill & driver bits. - Made of aluminum alloy: strong, durable and anti-rusting. - Can be used with drill bits from 0.3mm up to the size of 6.5mm. - Unique locking function, traditional locking methods, back having ratchet teeth, the locking pieces mounted on the rear sleeve, more effective in preventing work loose off, so that the clamp chuck,more reliably support tools. - Use ordinary drill bits with your drill. - Warm Tip: Dear buyer, due to lighting effect, monitor’s brightness, manual measurement, etc., there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you! Package list: 1 x Drill Chuck