Hardware and installations are supplied. Brackets have two positions to attach to wall. Hard for me to explain but the instructions make easier to understand.
I bought 26 sets of these shelf brackets to build a custom CD rack (physical media will never die because you can't autograph a digital file after a concert). The metal is solid, the paint is good and color consistent, and I really love the look of the white with my walls and varnished 3/4" natural cherry shelves. And I have soooooo much more collection space!
Most importantly, I never found anything like this after searching the whole Internet and really not liking most of what's out there. You have spectacular taste and quality.
Brackets look great and are very solid. Can't wait to put them up!