BEST VALUE - Our Replacement Mortise Patio Door / Sliding Door Lock Is The Best Value You'll Find. No Need To Pay More For Nuisance Parts To Replace Your Old Or Broken Latch. EASY INSTALLATION - The 45 DEGREE Keyway Mortise Locking Latch Includes 2 Screws For Easy Replacement Of Your Old Or Broken Latch. Can Be Inserted Directly Into Wood, Aluminum Or Vinyl Doors That Have Center Holes That Measure 3-11/16”. Can Also Be Used With Doors That Have An Outer Plate / Keeper. REPLACE OLD OR BROKEN DOOR LOCKS – When The Latch Begins To Stick Or It's Not Locking Type, This Inexpensive Replacement Lock Is What You Need. Save Yourself A Trip To The Hardware Store And Save A Few Bucks DIMENSIONS & SPECS - Screw Holes Measure 3 11/16" From Screw Hole To Hole. Height (Including Screw Holes) 4": Height (Body Top to Bottom): 3.2" Width: 1/2" Length: 1.12" ADJUSTABLE LATCH - Sometimes It Can Be Tricky To Get The Correct Angle Of Latch To Connect To The Locking Mechanism On The Door. Our Latch Is Spring Loaded And Adjustable To Ensure Proper Grab Using A Small Flat Screw Driver You'll Find Our Replacement Mortise Locking Latch For Sliding Patio Doors Is an Inexpensive Quality Solution To Repair That Broken Or Problematic Sticky Latch. This Is A 45 Degree Keyway, This Means That The Angle On The Latch That Inserts Is NOT Vertical But Angled At 45 Degrees.