Flat ( 0" ) Depth --- Offset Mounting Canvas Z Clips For Picture Framing -- #6 X 3/8" Pan-Head Screws Included -- Pack of ONE HUNDRED FORTY FOUR (144) Securely hold your artwork in your open back frame with our Metal Offset Clips. Our double hole, reusable offset clips are Zinc-Plated. One #6 3/8" round phillips head screw included per each clip. Choose Offset Clips in depths of 0", 1/8", 1/4", 3/8", 1/2", 5/8", 3/4". 1", 1-1/4" in packs from ten to ten thousands clips!