60mm polished chrome night latch rollerbolt cylinder night latch high quality branded product british supplier roller bolt night latch is the modern equivelent to the traditional cylinder nightlatch ever locked yourself out then a roller bolt night latch is what you need replaces traditional 60mm cyclinder night latch ellimanates accidently locking yourself out because you have to lock the door on exit easy to lock from the inside with the thumb turn everything you need is included in t