These metal-shelf utility carts have shock-absorbing casters and cushioned shelf matting that absorb shock and vibration while the cart is rolling, which helps protect fragile items on the cart from damage. The matting also has a nonslip surface that stops items from sliding on the shelves and colliding with each other. Also known as instrument carts, these wheeled carts are used for moving delicate, vibration-sensitive equipment in laboratories, testing facilities, and similar areas. Metal-shelf utility carts are more rugged and can hold heavier loads than plastic-shelf utility carts. They are used to organize, transport, and store items, and they have open metal shelves that allow items to be efficiently loaded and unloaded onto or off of the carts.