The EasyTroller trolling plate slows your boat down to as little as 1 mph for slow troll fishing. The EasyTroller's patented spring hinge design flexes upward to prevent damage to the trolling plate under accidental acceleration. The optional hydrofoil fins help to improve your hole shot and maintain a steady plane. Mounts directly to cavitation plate. snaps into position a few inches behind the prop. Releases with simple pull of cord. Fits most outboard and Inboard motors 30 HP and up. heavy-duty marine-grade anodized aluminum and stainless steel construction.1-Year warranty.