1、Universal Designs: Not only suits for 1/2in driver and 21mm hex driver, the universal wrench extender is ideal for various combination wrenches. 2、Premium Structure: Comes with a sturdy structure, the wrench extender tool can withstand high torsion in the leverage, simplifying the operation. 3、Wider Application: Allows for broad application on installation, assembly, automobile maintenance, processing, screwing and unscrewing, and so on. 4、Using Great Metal: Mainly made of premium metal material with good coating, the heavy duty wrench extender is not easy to slip, durable with wearing. 5、Easy for Carrying: Light in weight and compact in size as well, the wrench extender tool is very convenient to carry for indoor and outdoor use.