The jack plate that can be adjusted from inside the boat with one screw. No side hardware to loosen! Just turn the adjustment screw to the desired height, tighten the locking nut and you are ready to go. Interlocking flat bars for added strength, 585 lbs. max rating. Anodized aluminum body. Ideal for Bass, Flats, Walleye and Bay boats, aluminum boats, skiffs and even offshore racing.