Hold circuit boards up to 12-Inch (304.8mm) wide and up to 0.156 (4mm) thick * Arms move independently and feature V shaped grooves * Shaft is 4.125 (104.8mm) long and 5/8 (15.9mm) in diameter * Height (bottom of shaft to tip of arms): 10.875 (276.2mm). Weight: 1.0 lb. (0.5kg) * Limited Lifetime Warranty!