888A-2 Dual-tongue
internal& external cross lock 

888A-5-02 Three-direction four-tongue
nternal& external quantum lock

888A-6-04 Three-direction five tongue
internall& external quentum lock

888A-6-03 Tri-direction five tongue
internall& external cross lock 





888A-7-02Dual-tongue internal&externalcorss lock

888A-6-02 Three-direction five tongue internal&external quentum lock