... have change-over switch,zinc alloy lock,brass key; Roller door switch/Key SwitchModel:OL-8102Application:Automatic door ,Roller door,Motor etc ... aluminium case,inside have change-over switch,zinc alloy lock,brass key;This lock have good seal and waterproof function.Size: 70 ... /Carton:11.2KG, NW/Carton:12KGWire Connect Drawing: OL-8102 Automatic door Key switch lock