Internal door handles usually come in two variations, on back plate or on rose. Lever handles on back plate can also incorporate locks to secure the doors around your property or bathroom. Lever on rose handles are often used to add a bit more style or modernise a property and are available in contemporary designs.
Choose either a lever latch or a lever keyhole depending on the desired effect. Lever latch is used on most internal doors which you do not wish to lock.
Bathroom door handles usually have a latch mechanism. The most common locking mechanism on a bathroom door is a mortice lock, this allows you to lock the door manually with your hands without the use of a key and lock.