Name: Coin return lock Material: Stainless steel and ABS Competitive price, best ... patent technology, we can make it non-defect, free of coin jamming and sliding.5.You can insert one to three ... use it to change key cylinder.7. OEM:any metal coin is available,like Euro, Peso ,USD,etc.8.The lock ... is used in wooden locker, plastic locker and steel locker. coin free of charge lock