Ikea Adils table leg or 40mm tube shelf bracket.

myminifactory

This is a bracket I designed to allow a full size shelf to be fitted at any height underneath an Ikea table fitted with Adils 40mm legs. The bracket clamps around the legs, just slide onto the leg and lock in place at the desired height using a 25mm (approx) 4mm bolt, tighten enough to stop the bracket sliding, if it won't twist on the leg using reasonable force, then it's tight enough. There are two screw holes in the top of the bracket to attach to the shelf.