With this kit you can attach the board or gangway overboard. Attaches to the handrail with 360° adjustable stainless steel clamps. The quick-change handle system allows each carrying handle to be quickly folded down when not in use or tightened, making it also suitable for narrower SUPs or gangways.Each support bar is equipped with a protective cover made of high-density PVC foam that protects the SUP or gangway from abrasion, as well as adjustable and easily removable tethers.default: for tubes with a diameter of 22 to 30 mm with plastic supports.