Prime-Line U 9846 Patio Sliding Door Loop Lock – Increase Home Security, Install Additional Child-Safe Security, 1-1/8 In. Hardened Steel Bar with Diecast Base, Nickel Plated (Single Pack)

Don't take the "Frequently Returned Item" box as a sign this is low quality. It is not. I got tired of having to bend down behind the couch every night to put the 2 x 2 in place so the door wouldn't slide. This turned out to be the perfect solution. Five stars all day long. I suspect the "Frequently Returned" is due to things like not having the space to mount or the correct tools. Below is what you need to measure and need to mount properly.Tools you are going to need to mount properly.Drill. Even a cheap $12 corded drill, doesnt matter.3/32 metal drill bit for starter holes. (Titanium works best and is cheap)Fine point Shrpie or pencil.Phillips ScrewdriverThese are 3/4" wide, so at a minimum, with door fullly closed you will need a surface of 3/4" for both the latch and reciever side. The minimum distance with the door closed from the outside of the latch to outside of reciever side is 2" in order for it to lock. So if your door frame or outside trim is less than 3/4" with a distance from outside to ourside of the mounts of 2", this likely won't work. Also keep in mind that part of your glass is inside the door frame,so you don't want to be drilling holes through and cracking the glass.Mounting (For me) that took less than five minutes.Decide where you want to put it.Put the lock together and hold it in the position you want to hold it and mark the screw holes with the sharpie or pencil.Drill the starter holes.Screw in with Phillips Screwdriver.Simple to mount. Works well.

I replaced the sliding glass door handle on an older sliding glass door (built in 1980s) and the lock didn't quite work correctly. So I bought this lock.This lock is great! It is so much safer than the handle locks. I cannot be lifted off the track like the handle locks. It looks great with the door and makes me feel so much safer! For such a reasonable price, I recommend it for anyone who needs a good reliable lock for their sliding glass doors. Since it fits on the frame of the door, it fits pretty much all sliding glass doors.

Excellent fit. Be sure to measure the width of the door track prior to ordering. Good value and strong locking system. We have a massive glass sliding door to our patio and pool. Adds an extra layer of security and safety. Our kids are not tall enough to unlock and gain access to pool unattended. Looks great.

I purchased five of these Defender Security loop locks and installed them outdoors approximately 2 years and 3 months ago (around February 2023). After being exposed to outdoor weather conditions for this entire period, they understandably show some visible signs of rust and corrosion on the nickel plating.However, despite this cosmetic wear-and-tear from the elements, I can report that all five locks are still fully functional and working without any problems. They have held up quite well structurally, considering the outdoor installation. If you're looking for a basic secondary lock that proves durable even when used outside, these have performed reliably for me over the long term.

Couldn’t find a sliding glass door lock set that I thought was durable enough and plus my sliders open from both ends so I figured putting one on each end would be the best. It gives me the satisfaction of being secure..

Absolutely easy to install in our sliding doors and it gave us that extra security we were searching for. There is no way the door will open with this lock.

Perfect what I needed it for. It's not very esthetic but I couldn't find a better solution for my folding door.

muy buena calidad