Looking for Answers about Northern Industrial Auto Wheel Dollies - Pair, 1000-Lb. Capacity Each?

Dollies maneuver easily on strong casters and hold up to 1000 lbs. each! Capacity (lbs.): 1,000, Caster Size (in.): 3, Dimensions L x W x H (in.): 23 5/16 x 15 13/32 x 5 7/64, Pairs (qty.): 1, Distance Between Slides (in.): 19 3/4, Distance Between Rollers (in.): 11 13/16, Distance from Floor to Bottom (in.): 2, Distance to the Lip Edge (in.): 3 13/64, Distance to Top of Rods on Mounting Deck (in.): 2, Tire Size (in.): 3, Material: Steel, nylon Designed to make it easy for a person to move a vehicle in any direction Place a wheel dolly under each tire of the vehicle to roll in any direction with ease All-steel construction for durability Rails on each side make carrying the units easier Large 3in. roller-bearing casters for long service Works with cars, trucks, aircraft, boats and trailers, ATVs, riding mowers and more One pair of dollies are included Order 1 pair for trailers or other two-wheeled vehicles Order 2 pairs for cars, trucks, ATVs and other four-wheeled vehicles