Alloy Material: The telescopic electric wrench conversion head is made of high-strength and impact-resistant alloy material, which has good performance effect during use. . Compatibility: The drill chuck adapter can securely attach any 1/4 inch hex shank drill bit, universal electric drill adapter. . Function: Use this chuck converter to convert air or electric impact wrenches into drill bits or ratchet wrenches. . Portable and Convenient: Retractable ejector adapter, easy to replace drill bit and sleeve, tightly clamp compact body, easy to use. . Absolute Satisfaction Guarantee: If you have any questions or suggestions about this product, please do not hesitate to by email, we will definitely give you a satisfactory solution and never let you suffer any loss. . Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.