Retractable quick coupler with built-in stable lock and high-efficiency spring for faster bit replacement. Made of chrome-vanadium alloy steel, the adapter features stable performance, wear resistance and durability. Spherical handle with non-slip design, press the drill bit to release, allowing quick replacement in one second. Universal 6.3mm (1/4 inch) hex shank enables quick separation between electric drill and drill bit. Suitable for electric drill chucks without quick change function, such as hand drills and lithium drills. Product Specifications: - Quantity: 3 pieces - Product length: 50mm - Hex handle diameter: 1/4 inch (6.3mm) - Packing size: 12*7.5*2.5cm - Single product weight: 40g - Package weight: 120g - Material: Chrome vanadium alloy steel - Magnetic: No Warm Tips: Please allow slight errors in product size and color due to different measurement methods and display screens. Color as shown. Customer Service: If you have any questions or concerns about our products, please feel free to contact us, and we will get back to you within 24 hours. Thank you for your support and understanding.