Loop the 5'L nylon strap through a plate insert or kettlebell handle and slip a numbered pocket on the strap’s buckle. Then, slip the straps molded-rubber collar on each bar sleeve, suspending the plates below the bar and allowing them to move freely. This creates instability and increases the engagement of core muscles to maintain proper form during squats, overhead presses, and rack carries with bands. Numbered strap loops ensure a quick and accurate adjustment on each side. Each strap holds up to 135 lb. Recommended to use with bar collars.