Key switch with dismantling protection, button (changeover contact), 1-pole, 10 A 250 V ~ with screw terminals for rigid and flexible conductors up to 2.5 mm2 Connection terminals in accordance with DIN VDE 0632 (EN 60669) (screw fastening, without fastening claws) for profile half cylinders with a total length of approx. 40 mm (DIN 18252), e.g. item nos.: 28, 28 G1 When using other locking cylinders, make sure that they only have an opening for the key on one side (otherwise no protection class IP 44)! The key switch cover can only be dismantled when the lock is in the unlocking position.