I was using this on my home's front door. MIWA cylinder lock, with 5 keys. (One is a copy; there are 5 keys in total, although the photo shows 4.) It's convenient to have multiple keys. I've added a photo of the key I mainly used. The key has a cover, making it easy to use. The product number for this cylinder is as follows: MIWA U9 LIX cylinder Cylinder and keys only; the strike plate is not included. This is a replacement cylinder part. Please check the dimensions on the manufacturer's website. I replaced the cylinder myself by checking the dimensions on the website. I'm selling the original keys and cylinder as a set, as I only replaced the cylinder with a new one. The metal parts have some dirt and grime. Will be shipped in recycled, simple packaging.