Features 1. 1/2-Inch Drive or 21mm Hex Drive: Our wrench extender is compatible with 1/2-inch drive or 21mm hex drive. This wrench extender adapter is perfect for professionals. As a technician working on heavy equipment, you may need to have these. 2. There Are Two Ways To Tighten And Loosen: designed to extend the wrench with another wrench to generate greater leverage. Using different wrenches to loosen or tighten stubborn rusty nuts and bolts can make disassembly easier and more labor-saving. To change tightening or loosening, simply place it on the other side of the wrench. 3. Durable Steel Structure: The heavy-duty structure of this universal wrench extender adapter prevents the driver from slipping or rounding. The heat-treated steel structure makes the wrench extension sturdy and durable. Forged body wrench adapter. 4. Anti rust material: Heat treated steel, protective coating can prevent rusting. This universal wrench extender is perfect for repairing rusted nuts and bolts. Resistance to daily corrosion and loss of gloss. Durable and can be used for many years. 5. Excellent Wrench Extender Tool: The universal wrench extender adapter can save you time and effort. Very suitable for increasing leverage on stubborn nuts and bolts, as well as entering difficult to reach areas. Specification Material: Alloy steel Color: Black Size: 8 x 6 x 4.3 cm Weight: 255 g Package Include: 1x Hexagonal Wrench Conversion Adapter