Just twist & screw these plastic hangers into 3/16" or 1/4" thick foamcore or gator board sheets without needing to punch into the image area. The hanger portion features a hole for hooks, wire or string with 2 flat sides and can are designed to hold board sizes up to 24 x 48 inches, although they can be used approximately every 24 inches on larger boards with no frames added. Available in your choice of black or white - 12 pieces per bag. Dimensions: Head 1/2" H x 3/8" W x 5/16" D Overall 1-7/16" High Hole 1/8" W x 1/4"