This is well-made hardware for folding tables. Consisting of a pair of handed brackets, it is used to translate a table top up 6" and over 13 3/4". Installation is straightforward (basic instructions included), requiring only that the brackets are screwed to the inside of the carcass, and then coupled with a wooden follower bar for lateral stability. The table must have clearance of 16" between skirts, with a skirt depth of 4 3/4".