Designed for swing in doors, the IS surface mount handle handle set offers a sleek and stylish solution to a unique door. Most storm door handle sets are made for out-swinging storm and screen doors in mind, making it difficult to find a fitting replacement handle style for in swing doors. That's where the IS comes in. Capable of being installed on left swing doors and right swing doors that swing inwards, this versatile and easy-to-install in swing screen door handle is compatible with doors 7/8" to 1-1/2" thick. The distance between screw holes is the standard 1-3/4". The inside handle has a locking feature that prevents the outside handle from turning, providing a layer of security to your in swing screen door and storm door by acting as a swing in door lock. No key lock is available for this in swinging screen door handle set.