
These fit perfectly with the KV4850FM case and rails I bought. The installation is very solid once the screws are tightened. Make sure you have your own screws as they are not supplied with the product. Installation instructions are miserable because there are none! None of these came with the product, and searching the web reveals multiple methods, none of which fit the standard face-framed case we have. Those you will find have terrible warnings when parallel/square cabinets are misaligned by more than 1/16" whose cabinets are not at least that badly misaligned, even if they are new, let alone old cabinets, the years have been seen of use!