The supplied bolts are for a 2”x 2” application, but I bought some longer 5/8” bolts to mount to the side of my Smith machine. I set it at my chin height and it seems to be perfect. You will need a 2x4 board to prop your toes up on or a squat wedge, set closer to the pivot point (see picture), otherwise you will feel it in your lower back more than anywhere else. I recommend setting up your hardware by size on the head as some are just a 5mm difference and it matters.It comes with supplied wrenches but I recommend having a couple of adjustable wrenches or a wrench and socket set with 14, 17, 19 & 24mm.Overall it’s a great addition to a home gym with limited space.