Sliding Glass Patio Door Lock, Mortise Type, 45 Degree Keyway, 3-11/16" Screw Holes

This item was a exact replacement fit for the latch that failed on our patio sliding door. Just be sure to check the measurements for the door it is to be installed on. The latch works great and is sturdy.

Did the Job

This patch kit fit perfectly in my patio door. The spring in the original one is what gave out. This one was a perfect fit, functions as it should and appears as though it should last a long time.

This latch worked beautifully with my Pella door. As others have mentioned, clamp some vice grips on the latch prior to unscrewing the old one to prevent it from falling inside the door. Do the same with the vice grips when installing. 5 minutes to change out. Perfect.

This lock fits and functions exactly like the factory lock which broke after about two years. So far it has been reliable.

After carefully examining the photos and dimensions, I determined this had the correct features to replace the broken mortise latch on our patio door. There are videos on-line explaining the many subtle variations in these locks and after viewing them it wasn't hard to determine that this lock had the correct dimensions, lever orientation, screw type, and cutout shape. It didn't take long to install, but it did take some fiddling to make it latch correctly and easily. Good purchase and learning experience, as these mortise locks don't seem to last more than a few years on high traffic patio doors.

Not having installed a sliding door lock before I wondered how difficult it would be. Removing the old lock was the toughest issue due to a little corrosion on the bolts. Once that was done it was two minutes to install the new lock and check to see it works. The lock was manufactured well.

My niece's husband installed it in a few minutes. When the original lock broke, I couldn't find a locksmith to replace/repair it. One said there are dozens of different locks,sizes & quality from substantial to cheap Chinese made ones . So I looked on Amazon, found this one that looked identical & decided to try it. For once I lucked out! Figured I could return it if it didn't fit - or yard sale it, since it was inexpensive. It works as well as the old one & eventually when the spring wears out on this one, I won't feel intimidated about replacing it. Just bought 2 more to have for spares. The first one lasted about a year, so I want to be prepared.