The M.Marcus Standard Nightlatch Black has a stylish modified design of the traditional nightlatch. The operating lever and slide button are finished in the same finish as the main body. Other Variations This nightlatch is also available in the following finishes: Black Satin chrome  Some of these can be found in the related products. Standard Width Nightlatch The modern nightlatch is available in two sizes to suit every door stile. This one comes in a standard size, which has a case width of 92mm and a cylinder backset of 60mm.