how to use Spider Feet This durable, steel sign holder foot secures your 1/4 inch thick printed sign boards to stand up in a vertical orientation - perfect for use on tables, counters or floors. Features a durable, black powder-coated texture and one hole to secure the board with a screw/nut or aluminum screw post. Use 1 for small pieces or 2 for wider signs. Total foot measures 6 wide overall x 1.5 deep x 1.5 high with 1/4 mounting channel in the center. Sold 1 base foot per package. Use 3/8 Aluminum Screw Posts to secure these sign stand bases to your 1/4 boards listed below.