I needed a small shelf for a small PC speaker sub. So why not make the brackets for the shelf since I already have a 3D-printer? So I did. They worked out nicely so here they are for all to print. Measurements: Top arm is 140mm (5.512in) long from wall to tip. Bottom arm is 100mm (3.937in) long from shelf to tip. Bracket is 10mm (0.393in) wide. Screw holes are 3.5mm (0.138in) in diameter and the screw head counter sink holes are 7mm (0.275) in diameter. Im shure you have something laying around that will fit. There are access holes for a manual screw driver for the innermost corner screws. A hole big enough for the bit extender of a power drill to fit trough would mean a wider bracket. Tip: Use an awl (Or whatever thin pointy thing you have laying around, a large nail works to.) and a hammer on the wall beforehand to make the screws easier to screw in by hand. It will also keep you from moving the bracket out of place. Or just apply generous amounts of brute force.Pretty self explanatory. Print on the side laying down. No support or raft should be needed. If you are printing this in ABS then you might want to crank up the ambient temperature to avoid warping. It is a pretty long object after all. Those small contractions in the plastic add up when stuff becomes long. I got 17 grams of ABS used (per bracket) when doing 10% infill, and 19 grams when using 20%. So you might want to up it to 20% for a little extra stiffness and load capacity. The difference in material used was not that great. If you have other types of screws you can drill the holes up a bit. Depends on how many layers of plastic you used. More layers the stronger the part. I usually use 3 layers for load bearing items etc, so I have a bit of leeway to adjust things afterwards and the item does not end up to flimsy. Obviously shelfs using these brackets should not be used for really heavy items. But they will hold for most normal uses. Just use common sense, and don't sue me if you do not use common sense and decide to store your collection of cannon balls on it or something. Use at your own risk.