Modi-Plate Kit Modi-Plate Kit allows our headboards to be attached to non–Crate and Barrel bed frames and connects mis-matched frame and headboards of similar sizes. Steel. Includes 2 metal plates, 4 bolts and 4 lock nuts. Attaches non-Crate and Bed frames to our headboards. Attaches Queen size frame to a Full size headboard. Attaches Full size frame to a Queen size headboard. Attaches King size frame to a California King size headboard. Attaches California King size frame to a King size headboard. This kit does not attach a Twin size frame or headboard to a Full size frame or headboard, or a Queen size frame or headboard to a King size frame or headboard Material: Metal Dimensiones: 4" Width x6"H