The Fastest, simplest way to “Lock In” your drum tuning , snares or toms, top or bottom. Use it on that one “problem” tension rod on your snare drum (You know . . . that one that always loosens first, right under the hand that plays all the “back beats”) or on all the tension rods on all your drums, top or bottom. GPI ® Lockerz™ are a simple little part that can be “snapped on” your tension rods in seconds to prevent them from loosening. Lockerz™ can be easily removed for head changes, or leave them in place .