General description The 2PCS Mini Keyless Drill Chuck is a versatile conversion adapter designed for electric sanders and grinders. This self-tightening chuck features a clamping range of 0.3 to 3.4mm, allowing for the secure holding of extra-fine bits. Its 3-jaw design enables quick changes and removal of bits, making it an essential tool for various DIY projects. Technical specifications Shank Diameter: 3mm Clamping Range: 0-1/8" / 0.3-3.4mm Compatibility and accessories Fits all chucks Suitable for electric grinders Installation Ensure proper mounting to avoid deformation of the rear shaft. Usage Do not run the tool at high speed directly after mounting on the universal chuck.