Black, Pull and Keyed Locking Unit for Sliding Glass Doors, Provides A Better Grip When Opening Door From Outside, Eliminates Need For Mortising Key Cylinder Into Door Stile, Will Accommodate 7 Different Hole Spacing Patterns. The 3-15/16″ hole spacing is designed for use mortise lock installations using Adams Rite and W&F Mortise Locks. Spacings allow application to a variety of handle sets. Includes 1 Outside Pull, 1 Locking Cylinder and Installation Fasteners.