"These brackets are super durable and exactly what I was looking for. I have them installed with 1/2-in douglas fur planks and it looks really sleek.
SOME INSTALLATION NOTES - I recommend using toggle screws if you are not screwing into studs and plan to use these for kitchen shelving, as the brackets themselves are a bit heavy and you need the capacity to also hold dinnerware etc. Also, since the bracket holes are quite large, you may need to use washers for your set screws like me if you are using thinner shelves."
Heavy Duty Steel L Bracket for Shelf: Holds 100 Lbs, Made in USA