Square Keys

Square keys operate quarter-turn locks with a square spindle, found on electrical enclosures, meter cupboards, service risers, access panels, radiator valves and railway carriage doors. They are sized by the width of the square, commonly measured in millimetres, and some have multiple sizes on one tool.Before ordering, measure the square spindle or the recess in the lock, and check whether it is a male square that fits into a socket or a female socket that fits over a pin. The listing gives the sizes each key covers.Square keys should be used for authorised or legitimate access only, such as maintaining equipment you own or are responsible for. Equipment belonging to utilities or network operators must be left to them. Maintenance teams can order in quantity through Key Factory for Business.