Straps made of super strength webbing. Adjusts up to 48 in for moving furniture, appliances, cast iron bath tubs, HVAC units, sheets of drywall, shower casings, upright pianos & mattresses. Keeps carried object from marring floors because the straps have no casters. It encourages proper lifting techniques. In fact, it's the only OSHA accepted moving tool ever. Stabilizes objects when being carried. Each pack comes with a pair of straps.