The Drop Set Pin by Performance Pin allows the trainee to perform additional, lower-weighted repetitions beyond the point of failure. When used as directed, they greatly increase the efficiency and intensity of your workout, all without even touching the pins or weight stack! They provide a method for the trainee to continue unassisted for more advanced, weight-descending multiset training techniques, commonly referred to as Drop Sets. These pins eliminate the delays common with repositioning weight selections and user positions on weight stack equipment. When a decrease of resistance is needed to continue the drop set, simply lower weight to resting position, allow the Drop Set Pin to automatically disengage, and continue with your lower pre-set weight selection(s). Before ordering, please be sure to check equipment compatibility! This product must be used with a standard weight stack equipment that does not contain enclosed weight stacks with guards! The weight stack must accept selector pins that are 4" long and 5/16" diameter. Ensure that the weight stack holes accept this device by measuring the default weight stack pin. They are not to be used on weight assisted equipment such as the tricep dip/pull-up/chin-up machine.