... jack1. model max lifting max hooking jack-up height jack-up feet high hook QD5 5tons 2.5tons 160mm 345mm 43mm QD10 10tons ... , an axle railway bridge installation, and vehicles, equipment, heavy lifting with, the structure is simple, easy to use, safe and reliable ... move up and down swinging the claw, with the tooth claw, promote the linkage with rack up or down, and then the ...