High Security Nightlatch Specificiations: SABS approvedAnti credit card latchSupplied with 1x1 rim cylinderUnlimited key variationsReplacement cylinders purchased separately if requiredFeatures: Suitable as secondary security device on external doorsUsed in isolation, product offers medium level of securityRecommended to be used in conjuction with a Yale 5 lever profile cylinder upright mortise lock Article YDY1022SD High Security Nightlatch Close Traditional Nightlatch Y3 Nightlatch