The Heritage Brass 36mm Bathroom Turn & Release Polished Chrome is designed to be used in conjunction with mortice door bolts. It can also be used with M.Marcus door handles and knobs with the polished chrome finish (just bear in mind that this is a small turn and will not match the size of the handles/knobs roses). The release can be easily opened from the outside of the door, should there be any emergencies. The turn & release has a 36mm diameter. Other Variations There are other variations of this turn & release available in different finishes - these can be found as separate products...