About this 3D model

This is just a simple peg hook for a ½" French cleat system. Simple but useful. I printed with a 0.8mm nozzle in PLA with supports. Easily holds a hammer or 4' level. etc. I haven't pushed them to their limits yet. I suggest printing on its side so that layer lines don't face any large shear stresses. As pointed out by V8rick you need to add supports under the hook part.