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Compatible with both 1/2 inch drive and 21 mm hex drive, our universal wrench extender is designed to help you handle those stubborn rusty nuts and bolts in hard-to-reach areas. Simply flip over to change the function of this wrench extension tool, you can use it to either tighten or loosen those overtightened nuts. Made of sturdy carbon steel with protective coating, this corrosion-resistant, heat-resistant, rustproof wrench extender ensures great durability and high strength. Suitable for dealing with heavy duty machines, cars, household appliances, or a variety of applications.

Time & Effort Saving Tool: Even bending down or kneeling down cannot screw out the stubborn rusty nuts and bolts in hard-to-reach areas? Our wrench extension tool is especially designed to solve this problem, making it easy to tighten or disassemble the excessively toughest nuts by extending your wrench and lifting the level force, effectively reduce your time and effort.

1/2"" Drive & 21MM Hex Drive: Compatible with both 1/2 inch drive and 21 mm hex drive, this universal wrench extender is a must-have practical assistant to increase the working efficiency for professional mechanics, hobbyists, household repairing kit.

Tighten & Loosen Functions: Simply flip over this extended wrench adapter to change the function, you can easily use it to tighten or loosen those hard-to-remove overtightened nuts and bolts, perfect for dealing with heavy duty machines, cars, household appliances, or a variety of applications.

Portable & Compact Size: Measuring 3.15x2.55x1.37in(L x W x H), this universal wrench extender with compact size and lightweight is portable and easy to store in car trunk, garage and repair shop.

Durable Construction: Constructed by high quality sturdy carbon steel material with protective coating, corrosion-resistant, fade-resistant and rustproof, this heat-treated wrench extender ensures long lasting service life due to its high strength and durability.