Specification:The construction of the Beach Boat trailer jack is Heavy-duty Precision Steel with a zinc coated surface which makes them durable, strong and long lasting. Each Boat trailer jack has working load limit of 2000 pounds.Boat trailer jack has 10.2" Lift with 13.3" pneumatic tire,Can travel 10in (25cm) stationary. Material:The Beach Boat trailer jack is made out of Heavy-duty Precision Steel，Galvanized surface, easy to pass through any surface and not easy to rust. can be used in adverse weather and withstand harsh conditions. Ideal for outdoor 【heavy duty swiveling mechanism】:Heavy duty trailer jack pull pin activates the swivel mechanism to keep the jack stowed at 180° while driving or exercising; locks securely into place. And comes with different length bolts and fittings. Easily fit different trailer brackets for easy folding and storage. 【Quality Material】: trailer jack, the main body steel galvanized surface rustproof design, after 72 hours salt spray test, corrosion-resistant zinc coating even in the harshest environment. 【Widely Used】:Telescopic jockey wheels can lift and lower your boat or recreational trailer, foldable design for easy driving and parking, widely used to support a variety of boat trailers, yacht trailers, RV campers. Beach Boat Trailer Jack 2000 lbs Capacity with 13.3" Wheels-Heavy Duty for 10.2" Lift-RV Boat Trailer Bolt-On Swivel Tongue Jack