secret fixing

secret screwing, secret fixing, secret screw joint

A method of joining carpentry work by screws which are hidden.
References in periodicals archive ?
Trex costs around PS75 per square metre, including secret fixings.
For something a little different, take a look at the Stringline collection - a super stylish range of solid brushed or polished, marine quality grade 316 stainless steel house door numbers that come in both 128mm or 200mm height with secret fixings which allow them to stand proud of your wall or door for added effect, priced at pounds 61.