Specifications Contents:air impact wrench, cylinder, salver, lift bridge, oil extractor, three functional compression tester, tire conveyer handcart & brake tap d intension. 6.Stainless steel preventing from grease and rust. 7.Four wheels marching and self-locking insuring direction precision. 8.Mechanical tire trolley save time and manpow Function: tire changer and maintenance Wheel: four-wheel Size: 650*800*1100mm Weight: 65kg