888B-1 internal & external built-in lock(cross)
888B-2 External built-in lock(cross)
888B-6 Divided cross built-in lock(cross)
888B-1B Internal & external built-in lock(cross)
ST-1 Cross lock head
ST-2 Quantum lock head
ST-3 Magnetic lock head
888A-4 Dual-tongue electrical controlled lock