Print-ready 3D models

8 mm Rod Floating Shelf Hidden Bracket

This hidden floating-shelf bracket holds two 8 mm steel rods, 80 mm apart and 32 mm deep, in 8.3 mm slip-fit bores. It screws to a stud with four #10 or M5 screws through 5.5 mm holes in a 30 × 28 mm pattern, and the 110 × 40 × 32 mm body disappears into the back of a light shelf drilled to slide over the rods. It prints on its side, so the shelf load runs along the layers instead of pulling them apart.