Eagle’s Security Units are ideal for safely storing and transporting costly materials and items subject to pilferage. Patented QuadTruss ® design (patent #5,390,803) makes shelves up to 25% stronger. Heavy-gauge open-wire construction keeps contents visible for quick inventory checks. Variety of sizes are available in stationary models or with casters for easy mobility. Mobile Security Units includes four poly stem swivel casters 5″ × 1¼” two with brakes.