I've used all sorts of permutations of:- Locking leg stays, table leg stays, lid stays, and many, many more different to no avail. There are some suitable for jewellery boxes and the like and some for pasting tables that are far too long but nothing heavy duty enough for my needs. The first picture is from an American site (leg stay) and the second is from a picture I found. I need them to be heavy duty and about 150mm/6" in total length. Any suggestions appreciated.