Rim locks are available in a variety of types, including mortise rim locks, cylindrical rim locks, and tubular rim locks. Mortise rim locks are the most common type, and they are installed by mortising a hole in the door and then inserting the lock. Cylindrical rim locks are similar to mortise rim locks, but they do not require a mortise to be cut. Tubular rim locks are the least common type, and they are typically used on doors that are too thin for a mortise or cylindrical rim lock.