BedClaw 7 Inch Steel Bed Frame Extension Rails, Set of 2 Great for adding additional length to your bed to accommodate a longer mattress, footboard, or other uses. Four (4) Pre-Drilled holes for easy attachment. BedClaw&trade;Rail is angled steel, measuring 1.5"x1.5" on the two flat sides. BedClaw&trade; Rails are 13 Inches long