Feature: 1. Easy to : Immediately convert the impact drill bit and quickly replace the drill bit2. Easy to replace: The of keyless chuck are tightened to facilitate the replacement of drill bit3. Design: Three-stage jaw design, allowing you to easily hold 1.5mm-13mm round drill bits4. Function: Greater clamping force, which can effectively prevent the drill from loosening and is more 5. Application: Quick replacement of SDS Plus/Hex/ internal thread adapter with electric hammerSpecification: Number: Drill ChuckClamping rate: 1.5-13mmThread specification: 1/2-20UNFChuck size: about 71 x 43mm / 2.8 x 1.69 inMaterial: Metalcolour: as shownPackage Contents:4 x Metal Chuck KitOnly the above package content, other products are not included.Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.