This sliding patio door handle set is constructed of mixed materials including wood and diecast components, and it is designed to fit 90% of all internally latching type doors using a 3-1/2 in. hole center spacing. The outside non-keyed locking pull and the inside support are constructed of diecast and come finished in a black painted color. The inside pull is made of natural wood and is finished in a smooth, clear finish. This handle set is an internal locking, hook style handle set and it is non-handed allowing it to be used on both left and right-handed patio sliding doors. This handle set features an automatic unlatching option designed to prevent accidental lockouts, and it is used to replace damaged or missing internal locking, hook style handle sets on sliding glass doors with 1 in. thick door frames. Installation instructions and all fasteners necessary for the installation of this handle set are included in packaging. Product Selection Tip: Besides matching the style and type of locking mechanism, the other main specification to match is the measurement of the mounting hole centers, from center-to-center..