Hand trucks with extended nose plate features are sometimes referred to as box dollies because of their ability to carry large corrugated moving boxes because of the added support of the nose plate extension. The round handle for hand trucks has an ergonomic bend and is covered with a soft molded cover for a comfortable grip. Stair climbers for hand trucks allow you to maneuver hand trucks up and down stairs and over curbs safely and easily. US Cargo Control offers hand truck options with foam filled tires and pneumatic tires. Foam filled tires are also called "run flat tires" because the foam compound stays consistent in temperature extremes and even if punctured. Pneumatic (or air-filled) tires can provide some shock absorption qualities, but are also susceptible to punctures and pressure increase or decrease due to temperature changes. Pneumatic tires for hand trucks are similar to bike tires or car tires in this respect. Box dollies with extended nose plates are convenient for moving corrugated boxes because the nose plate extension provides a larger surface for stacking moving boxes. The extension can be folded up if it isn't needed or for tighter spaces where turning radius is important.