This is a multifunctional diecast locking patio door outside pull. Spacing for mounting was designed to work on Adam Rite, W & F and other similar type mortise latches. Non-handed design for use on right or left-handed patio doors. The tailpiece is notched for different break off lengths to fit a variety of door widths. Make sure to test fit the length you need before tightening and damaging the lock.