The HT3100 backplate series describes a simple rectangular backplate with concealed mounting (no visible screws). It is available in a variety of sizes and hole patterns to accommodate passage, privacy, and entry functions.
Available in a range of sizes to coordinate with knobs, levers, and cabinet pulls. Length and width should be specified in 1/4" increments when ordering; thickness in 1/16" increments. Backplate thicknesses may vary based on handle selection as well as mounting solutions.