PowerKnob ProSeries – Stainless The Ultimate In Steering Control! Edson’s classic Stainless PowerKnob is hands-down the best available on the market today. This is the one accessory you won’t know how you lived without. Features: 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