A finest top quality single-pole single-throw key switch with a zinc-alloy die-cast housing & cylinder with a chrome-plated bezel. The cylinder has a five-disc tumbler mechanism with dust shutter to deter lock-picking the reversible key can be withdrawn from either position. Ideal for burglar alarms & security systems. The switch has two solder bucket terminals at the rear. Supplied with two keys with a range of 150 combinations. Specifications