2452 - Double mortice cylinder Application For use with locking devices accepting screw-in cylinders. Specification State lock type when ordering to ensure that correct cam is supplied. Finish Standards Downloads 2452 - Double mortice cylinder (.pdf, 69 kB) Close 2451 - Single mortice cylinderFor use with locking devices accepting screw-in cylinders. 2457 - Rim cylinderFor use with locking devices accepting screw-in cylinders.