Drill-Free or Drill option High Performance Hydrofoils streamlined for speed. The SE Sport will improve handling and provide better maneuverability with a smoother ride. Features Turbo Trac to enhance thrust and control. Crescent shaped surface quickly funnels water for more thrust-cutting planning time for the quickest hole shot. Cuts planning time dramatically and keeps the boat on plane at lower speeds while saving on fuel and providing better stability. Features high strength copolymer construction. Stainless steel hardware included. All hydrofoils and the Sport Clip are 100% molded, crafted. Reduces or eliminates porpoising, cavitation, chine walking and deep-V wander. Sleek shape complements today's new boat designs. Silver trim covers all securing hardware. Manufacturer's lifetime warranty Recommended for outboards and sterndrives 40 to unlimited horse power. Exclusion: Volvos with the exhaust through the cavitation plate. For these sterndrives we recommend the Sport 300. Both drill (2 hold or 4 hole) and drill-free stainless hardware included. Simple and quick drill-free mounting with a common wrench or socket and screw driver. Proven Disk-Grips hardware for the drill-free attachment will not screw into or damage the edge of your cavitation plate. Does not require the Sport Clip for a drill-free installation.