FOR 1/2 INCH OR 21MM HEX WRENCHES: This wrench extender is compatible with 1/2 inch or 21mm hex wrenches. TIGHTEN AND LOOSEN WITH GREATER LEVERAGE: Designed to extend a wrench for increased torque. Use it with another wrench to loosen or tighten stubborn or rusted nuts and bolts, reducing effort required. To switch between tightening and loosening, reposition the extender on the opposite side of the wrench. DURABLE STEEL CONSTRUCTION: Made from heat-treated steel for strength and durability. Prevents slippage and rounding of fasteners. Forged construction ensures reliability. RUST-RESISTANT FINISH: Features a protective coating over heat-treated steel to resist rust, corrosion, and discoloration. Suitable for use with rusted fasteners. WRENCH EXTENSION TOOL: Provides added leverage for stubborn nuts and bolts and helps access hard-to-reach areas. Color: Black Material: Metal Package Contents: 2 x wrench extenders Note: Color may vary slightly due to screen settings and lighting. Measurement tolerance: ±1–3 cm.