The hinges are for mounting under the surface of a table with leaves that drop down. They are most commonly used with rule joints. If you would like some instructions on how to install rule joint hinges, let us know in the "comments" section during checkout and we will include them.
Quality: the quality of your furniture matters, so should your hardware. We use solid brass because it lasts forever.
Horton Brasses Inc., 49 Nooks Hill Road, Cromwell CT 06416, 800-754-9127