Pro Series EJ1000 Trailer Jack is designed for use with marine and utility trailers. Pro Series brand tongue jacks are time-tested and application-proven. Features clear zinc finish for corrosion protection. Bolt-on, includes all necessary mounting hardware and 3/8″ pull pin. Sturdy 6″ Poly wheel. The Pro Series brand retaining ring swivel mount offers minimal deflection and maximum support. Mount fits up to a 3″ x 5″ trailer frame. Capacity: 1000 lbs., Travel: 10″, Retracted Length: 13″, Extended Length: 23″ (Measured Center of Mount to Bottom of Wheel) Top Clearance: 11″ (Measured Center of Mount to Top of Jack)