· Light Trailer Tire Leveler can be used with the Single Tire Locking Chock· Eliminates the need for moving trailer onto blocks or ramps· Fits 13", 14", & most 15" wheels· Includes a ratchet wrench that can be used to turn the drive screw, elevating or lowering the tire lifting pads to the level position· Corrosion-resistant finish for long life. Do not use a cordless drill or cordless impact to operate the product unless the drill has an adjustable chuck· Distance between plates at the top: 20 1/4 Inches, Distance between plates at the bottom: 12 Inches