The Boat Roller Ramp Lifteasily raises your boat out of the water when not in use. Perfect for the lake home or cabin. No cables. No crank wheels. No wooden bunks. The all aluminum frame never rots and will accommodate all v-hauled boats up to 16 ft. long and up to 1200 lbs. Includes two big quad wobble roller assemblies, just like a premium boat trailer. Easy to load and unload. Three keel rollers support the front of your boat and guide it on the lift. Raise the stern and motor out of the water with the two aluminum screw jacks using a 3/4 inch wrench, ratchet or cordless drill. All for a great price! The shore end height is adjustable from 4 inch 20 inch. The lake end height is adjustable from 10 inch 36 inch before extending jack