BCP 4 Sets Wood Bed Mattress Support Metal Fastener, Screw Included Package included: 4 sets 4pcs male+ 4pcs female Right angle part L x W x H): 2 x 1-1/2 x 1-1/4 inches; Flat Part L x W): 2-3/8 x 1-9/16 inches. Material: metal Connect wood slats to bed Screws are included