1.Internal door design(CE,ISO2008,SGS,EC,5S) 2 ... :1000piece/day ZHE JIANG SHENDING DOOS CO.,LTD 1.Internal door design(CE,ISO2008,SGS,EC,5S)Standard Features ... lock is safe.(7). Hinges: galvanized steel hinges (external hinge,opening 180 degrees,interior hinge,opening 90-110 degrees ... . (11). Wide-angle peephole, easy for the owner to catch what is happening outside (12). Invisible alarm doorbell ...