MALOUF STRUCTURES Downward Pointing Bolt-On to Hook-On Conversion Bracket, Set of 2 This Structures modification plate is designed to convert a bolt-on bed frame to work with a hook-on headboard or footboard. Each modification plate is 10-1/4" tall x 3" wide; The hooks are 1-1/4" deep & overall bracket depth is 1-1/2". This conversion plate is designed to attach with the brackets facing down Steel construction creates a heavy-duty connection. Hook Depth 1.25 Set includes two conversion plates, to attach both a headboard and a footboard you'll need two sets.