Good Morning, I am looking for a specific shelf bracket I have used in the past but now have trouble finding. It looks like a long strip of thin metal about one inch thick and bent into a zig zag pattern. The bracket is ment to be nailed onto wall studs for storage shelving. The pattern gives a surface to place a shelf on and a under shelf support. There are three shelf units bent into each metal strip. What is the name of this type bracket and where can they be purchased? Thanks, Will