The Median Barrier Bracket Model SA-10436 attaches to concrete median barriers that are 5"-11" wide. The Median Barrier Bracket Model SA-28305 attaches to concrete median barriers that are 9"-15" wide. It is used with MDI's Median Barrier Sign Stand with Springs Model M4818®. The springs on the sign stand are fastened to the bracket with just two bolts. The bracket and sign stand assembly attach firmly to median barrier with four, screw-in T-handle spikes.