This is a Lockey 2950 Mechanical Keyless Narrow Stile Hook Bolt Lock.
My customer has a glass aluminum commercial pepper and wanted a keypad entry option on a low budget. It's very simple and easy installation with minimal modification needed to the existing holes carved in most commercial doors. Only complaint is that with the rubber underlayer it was too wide to allow the door to close all the way. Even with just the lock body it still scraped the frame slightly, should not effect functionality in long or short term however so solid 4 stars.