The Lewmar Power Grip boat steering wheel is made with durable, marine-ready stainless steel and features a strong, stylish three-spoke design. The integrated Power Grip knob allows for precision handling and professional control.• Pre-installed Power Grip knob for professional control• 316 stainless steel for lasting weather resistance• Ergonomically designed with finger grips• Three spokes for strength and style• 3/4" tapered shaft and 1/2" diameter hub• Weld nut fits 1/2" threads• 13-1/2" wheel diameter | Lewmar Power Grip Boat Steering Wheel with 1/2" Welded Nut - 13.5" Stainless Steel