For lifting tons, mobile boat crane has two types, light duty travel lift and heavy duty travel lift. Small travel hoist Perfect Steerable Transfer Cartludes 25 ton travelift, 35 ton marina boat lift, 40 ton straddle lift crane;Perfect mobile boat hoist Perfect Steerable Transfer Cartludes 300 ton marine hoist crane, 400 ton marine travel lift, 600 ton mobile boat lift , 800 ton yacht travel