Stainless Steel Hidden Mortise Lock Hardware with Key and Screw for Door, Key Length 4.13" / 105mm

Small and inexpensive. Works well. Exactly as advertised. Received it quickly.

Cheaply made but will serve its purpose

Perfect Fit

This is really a neat invention and easy to conceal a locking mechanism.

Lasted 2 weeks poor quality

You need some DIY skills as there are no instructions. The packaging is entirely in Chinese!The overall quality isn't that good but it does the job. Typical low cost Chinese product. It's not in the same league as one I bought in Menards many years ago, and it's smaller overall.Only one key, which is just a cast star-like cross section but not cuttable at your local locksmith. So, if you need a second or spare key, you have to buy another kit! The key is about 3x longer than it needs to be and the pot metal is already wearing where it runs on the rack inside the lock. Sometimes it slips on that rack.It served my purpose but I'd try another brand next time.

It works as advertised, but it's not a smooth process. Worth the price, but if you can find something better, it would be a good idea to get that instead.

Bought 3 for a project and wore the first one out before I got the other 2 installed. Key is soft and has small gooves from rack gear. grooves are not very deep, but enough that it will no longer move the rack gear to engage the lock. Drag on the lock is less than a typical door application so no excuse for it to fail that quick. The other 2 will be going in the garbage.