Features PREMIUM QUALITY - Made of high quality alloy steel, our key extender ensures durability and prevents slipping or rounding, providing long lasting performance. A good quality can not provide a more for your life, but also good materials can increase the service life of the product. Rustproof and Durable: The universal key adapter is made of high quality carbon steel material. Built with a durable construction, our extension adapter is rustproof, making it ideal for use on rusty nuts and bolts while resisting daily and tarnishing, ensuring reliable performance over time. Versatile Tightening & Loosening - With both tightening and loosening functionality, used on different wrenches to loosen or tighten stubborn rusty nuts and bolts, which can be removed more easily and save effort. Enhanced Compatibility - Universal key extension adapter can save you time and effort. Equipped with a 21mm hex extension adapter, our tool offers increased compatibility with 1/2 inch sockets or impact wrenches, allowing easy access to tight spaces and maximizing productivity in various applications. Wide Applications: For garages, repair shops, DIY projects and more, our wrench extender is suitable for all applicable scenarios, offering convenience and versatility for all your tightening and loosening needs. Made in strict accordance with standard requirements. Specification: Item Type: Wrench Extension Colour: black. Material: metal with varnish. Application: for 1/2 inch driver or 21mm hex driver. How to use: Pull out and use directly. Packing List: 1 x Wrench Extension Package List 1 x Wrench Extender