The PH3500SL Self Leveling Pipe Hook has a 3,500 pound capacity. It hooks up to the machine with a shackle/sling assembly like the Kenco RIGMAX. A cylinder housed inside the upper assembly of our pipe lifting attachments levels the pipe as it is raised. Often referred to as a C Clamp, the Pipe Hook picks pipe from the side versus from top as with the Pipe Lift.