Designed to eliminate the spinning of all cam locks and wing closures on any door. Works on all doors from 5/8" to 1-1/8" thick. Secures cam locks so they cannot be manually spun creating a much more secure closure. Keeps wing closures aligned and consistently locking and unlocking in the same direction. No more guessing which way to turn a closure to open or close it.Comes in packs of 9, 18, 27, 36. Rust free aluminum with stainless set screws.