Mechanical Fast Clamp, Carbon Steel, Nominal Conduit/Pipe/Threaded Rod 1/2 in, Length 11 1/2 in, Width 1 7/8 in, Hole Size 9/16 in, Galvanized Finish, For Use With Seismic Bracing to Hanger or Structure, Description/Special Features Breakaway Bolt Heads, Standards TOLCO