Description: This universal wrench extender, designed for 1/2 inch or 21 mm hex drivers, offers professionals greater leverage for loosening stubborn nuts and bolts on heavy equipment. Constructed from durable heat-treated carbon steel, this tool resists slipping or rounding, ensuring long-lasting performance. Featuring a rust-proof protective coating, it is ideal for tackling rusty fasteners, providing efficient access to hard-to-reach areas and saving time and effort in repair tasks. Name: Wrench expander Color: Black Material: Carbon steel Dimensions:3 x 2 x 1 inch Packing list: 1 x wrench expander Note: 1.Due to screen and other objective reasons, there may be a certain color difference, please understand. 2.Due to manual measurement, please allow 1-3 cm error, thank you. 1.1/2 Inch driver or 21 mm hex driver:Our wrench extenders are compatible with 1/2 inch driver or 21 mm hex driver. This wrench extender adapter is ideal for professionals. You may need to have these when working as a technician on heavy equipment. 2.Two ways to tighten and loosen:Designed to extend the wrench with another wrench for greater leverage. Use on different wrenches to loosen or tighten stubborn rusty nuts and bolts. 3.Durable steel construction:The heavy-duty construction of this universal wrench extension adapter prevents the drive from slipping or rounding. The heat-treated steel structure makes the wrench extension strong and durable. 4.Rust-proof material:Heat treated steel, protective coating can prevent rust. This universal wrench extender is ideal for repairing rusty nuts and bolts. Resist daily corrosion and tarnish. Durable and can be used for years. 5.Excellent Wrench Extender tool:The Universal wrench extender adapter saves you time and effort. Ideal for adding more leverage on stubborn nuts and bolts as well as access to hard-to-reach areas.