The corner brackets are forged with PAT DEC 8 06 and project from the corner 5". The math works when these are used with the side brackets shown that project 3" from the wall. If you look at this in plan view, there is 5-4-3 triangle so the wire maintains a 3" line away from the wall. Enough math for one day. The corner brackets are $60 each and side brackets $15 each. Take them all for $130 plus shipping ($10 to $14 depending on destination). All forms of payment accepted.