[1/2 inch Drive Or 21 MM Hex Drive] wrench extender is compatible with 1/2 inch drive or 21 mm hex drive. This wrench extender adaptor is great for .[Both Tighten & Loosen Ways]Designed to extend wrenches with another wrench to create more . Used on different wrenches to loosen or tighten stubborn nuts and , which can be removed more and save effort. Change to tighten or loosen, you just need to put it on the other side of the wrench.[Durable Steel Construction]Heavy duty construction of this universal wrench extender adapter prevents drive from slipping or rounding out. The heat-treated steel structure makes the wrench extension strong and durable. Drop body wrench adapter.[Rust Proof Material]Heat treated steel, the prevents rust. This universal wrench extender can work great on nuts and . Resists daily corrosion and tarnishing. Durable for years of usage.[Great Wrench Extender Tool]The universal wrench extender adaptor can save your time and effort. Great for adding more on stubborn nuts and and for into hard to reach areas.color: BlackMaterial: SteelPackage Contents:2 x Wrench ExtenderOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.