FOR 1/2 INCH OR 21MM HEX WRENCHES: Our wrench extender is compatible with 1/2 inch or 21MM hex wrenches. This wrench extender adapter is ideal for professionals. TIGHTEN AND LOOSEN WITH EASE: Designed to extend a wrench with another wrench for greater leverage. Use it with a second wrench to loosen or tighten stubborn, rusted nuts and bolts, allowing for easier removal with less effort. To change the tightening or loosening direction, simply position it on the opposite side of the wrench. STEEL CONSTRUCTION: This universal wrench extender adapter features heavy-duty steel construction that prevents slipping or rounding. Heat-treated steel ensures strength and durability. RUST-RESISTANT FINISH: Made from heat-treated steel with a protective coating to resist rust. This universal wrench extender performs well on rusted nuts and bolts. Resists corrosion and discoloration for long-term use. EXCELLENT WRENCH EXTENSION TOOL: The universal wrench extender adapter helps reduce effort. Ideal for adding leverage to stubborn fasteners and reaching tight spaces. Color: Black Material: Metal Package Contents: 2 x Wrench Extensions Note: Light reflection and different displays may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.