DescriptionThis 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-quick change drill &driver bits. Easily locks onto and releases drill bits.Feature- Color: As shown - Material: alloy - Size: 2.35 x 1.4 x 1.4cm - Keyless chuck easily locks onto and releases drill bits. Instantly convert impact driver to hold non-quick change 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 3.2mm. - 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 SDS drill, adaptor simply fits into SDS drill as would a drill bit.