All-steel jack with high-performance ZMAX zinc coating that withstands up to 600 hours of saltwater exposure. This bolt-through jack offers a stronger mounting system by eliminating the snap ring. Produces less deflection under load and during operation. For midsize boats 18' L x -23' L 6" thermoplastic caster wheel Provides 23" lift and 10" of travel Fits tongues 3" W x 5" H 1,200 lb. capacity Mounting hardware included Three year warranty