... case,inside have change-over switch,zinc alloy lock,brass key; Roller door switch/Key SwitchModel:OL-8102Application:Automatic door ,Roller door,Motor ... etc.Product Introduction:Material/Construction: High pressure casting aluminium case,inside have change-over switch, ... :11.2KG, NW/Carton:12KGWire Connect Drawing: OL-8102 Automatic door Key switch lock