The only jack plate you can adjust from inside the boat with only one screwThe only jack plate that can be adjusted from inside the boat with only one screw. Patented design has no side hardware to loosen. Just turn the adjustment screw to the desired height, tighten the locking nut, and you are ready to go. Great for bass boats, bay boats, flats, skiff and walleye boats or offshore racers. Rated for 585hp. Vertical lift of 3.5". Interlocking design provides strength. Anodized aluminum body, aluminum angle, bronze oil-lite bushings, precision stainless steel support rods Specially designed Bent Wrench allows simple adjustment of manual on-the-water plates