PowerKnob Sportsman Black. The Ultimate In Steering Control!. The rugged and economical Sportsman Series PowerKnob features the same ball-bearing design and ergonomic shape as the ProSeries. The Sportsman Series Knob is built of black polymer and marine-grade stainless with precision milled bearing races. Feataures Improves handling and performance. Maneuver with precision and confidence. Twin races of fast action ball bearings. All-weather construction. Strap or bolt onto virtually any steering wheel. Smooth ball bearings. Easy 5 minute install. Ideal For Boats. Tractors. Golf Carts. Off-Road. Maintenance Vehicles. Lawn Mowers. Contents 1 Sportsman Series PowerKnob. 2 Wheel Rim Straps. 1 1/4 Allen Wrench. 1 2 Cap Screw for Thru-Bolting The Ultimate In Steering Control!. The rugged and economical Sportsman Series PowerKnob features the Feataures . Improves handling and performance Maneuver with precision and confidence. Twin races of fast action ball bearings All-weather construction. Strap or bolt onto virtually any steering wheel Smooth ball bearings Easy 5 minute install Ideal For