Chrome Vadium Steel : This wrench extension bar is constructed of quality chrome vadium steel with excellent torsional strength and endurance , which can withstand high torque pressure without deformation or breakage , and has a long service life Widely Compatible : This wrench extender tool bar supports a wide range of wrenches , including Allen wrenches , hexagonal wrenches , TX/XZN , socket wrenches , etc. , up to a maximum size of 0.7 inches (18 mm) Easy to Use : This wrench extender tool can be simply clipped onto an existing wrench handle to effectively extend the working length and amplify the torque applied , making tightening or unclamping easy and efficient , especially for stubborn or seized bolts Versatile Use : Whether it's for routine repairs , car maintenance or industrial projects , this wrench extension tool bar is a reliable and practical tool due to its sturdy structure , flexible adaptability and humanized design Safe and Efficient : This wrench extension tool is designed to help you reach hard to reach bolts easily , reducing arm scratches and body pressure , and improving work safety and comfort, Manufacturer: Sutowe