Review on OneTwoFit Power Tower Set - Multifunctional Wall-Mounted Pull-Up Bar, Chin-Up Bar, Dip Station - Ideal Indoor Home Gym Workout Equipment, Supports Up To 440 Lbs - OT126 Fitness Dip Stand by Badazz Webb

Wroks as advertised. The hooks for the lower wall position to allow dips must be set to a narrower width than the top postiion or else the leg lift arm rests will hit the lower hooks. Unlike the top hooks, the lower narrower position for the hooks will not align with 16" space wall studs so you need to mount into wood or something else as others have posted. A more thoughtful design could eliminate this problem so this is why i'm only giving 4 stars. If the wall is drywall you definitely want to mount into wood anyway as you need to protect the drywall as switching positions will mark up the wall. I put plywood over the drywall and mounted into studs, keeping both top and bottom hooks the same width. I then angled the leg lift arm pads so they don't hit the lower hooks when the rack is in the top position. Not perfect but it works and I feel better knowing both sets of hooks are into studs.