Retractable Quick CouplerBuilt-in stable lock and high-efficiency spring speed up the replacement of bitsExcellent QualityThe adapter made of chrome-vanadium alloy steel, stable performance , wear-resistant and durableSpherical HandleNon-slip design, press the drill bit to release it, helping you quickly replace it in one secondUniversal Hex Shank With the 6.3mm hex handle chuck, quick separation of electric drill and drill bit can be realizedDrill Chuck AdapterSuitable for electric drill chucks without quick change function such as hand drills and lithium drillsProduct specifications:Quantity: 3 piecesProduct length: 50mm Hex Handle Diameter: 1/4 inch (6.3mm)Packing Size: 12*7.5*2.5cmProduct Weight Single: 40gPackage Weight: 120gMaterial: Chrome Vanadium Alloy SteelMagnetic: NoWarm Tips:< /p>Please allow slight errors in product size and color due to difference in measurement methods and display screens.Customer Service: If you have any questions or concerns about our products, please feel free to contact us, we will get back to you within 24 hours, thank you for your support and understanding.