Ball bearing hinges, more durable than the washer and pivot hinge, with a much smoother action.
Parliament hinges, made for doors which need to open a full 180 degrees, with the knuckle cut away to make them less unsightly.
Plain hinges come with a 10 year mechanical guarantee available in satin and bright stainless steel.
Washered hinges mainly used for doors with a high use. Washers are used in the knuckle joint for extra durability.