... used unlock the door.Stainless steel mortise lockcaseMortise lockcase is made from 100% stainless steel, Fire-proof! Deadbolt and ... front and back panel, handle and latches all made in stainless steel, so it suitable for any environment, it is ... no need link wire when install, made of 100% Stainless steel + Steel meterial, Full mechanics without any circuit, FIREPROOF. InstallationFast installation ...