I wanted a reinforcement that I could mount afterward, after the assembly of my "Jonction P" cabinet shelfs.

Moreover, on my shell I have used black MDF shelf (valchromat) of 8mm thickness so I adapted a tube for 16mm long screw. Thus the screw does not pass through my shelf.

No support needed, just print stl file "JctPRenfortV2" as it comes.

Sorry for my english.

"JonctionP-RenfortV1" is a previous version with 2 screw instead of just one in 27x27mm wood cleat.