This French Colonial Door Levers are metal levers designed for indoor residential applications, intended for converting vintage-style door knobs to levers. These levers feature a heavy weighted casting design that offers a vintage aesthetic suitable for interior use. The levers are constructed from metal with a Brass finish, reflecting the French Colonial design style. For smooth operation of the door levers, silencer bushings are incorporated into the mechanism. Key dimensions include a Lever Length of 4-1/8". Installation requires compatibility with 1/4" square drive systems and utilizes a 3/8"-20 thread size for secure mounting. The lever shanks include setscrews for fastening, which are included in the set to allow for secure attachment to the door mechanism. It is important to note that these levers are not for use on pre-bored doors with large, newer-style doorknob holes without performing necessary prep work first. The set accommodates different door preparations with two spindle lengths provided: 1 Spindle Length measures 2-3/4" and 2 Spindle Length measures 3-5/8". The use of silencer bushings contributes to the quiet function of the lever mechanism in residential settings.