Introducing the M3 Shelf Buddy. A compact way to install a 5mm shelf support mount on any vertical surface. All you need are 3x M3 screws per mount!

Note - you will need a minimum of 3 Shelf Buddies to support 1 horizontal shelf. This will require 9x M3 screws (3 per Shelf Buddy).

EDIT - New “Chonker” version increases the thickness, and adds a small chamfer to the base to assist in part removal if printed in resin.