New from Edson, this PowerKnob features a rubber grip insert for the ultimate in fingertip control. The rubber insert is soft to the touch with a tactile, nonslip finish and deep fingergrips for a secure hold. Made of Santoprene, this grip is very durable and resistant to sunlight, saltwater, oils, and perspiration. Built of marine-grade stainless steel with Delrin ball bearings for super smooth operation. Strap or bolt on steering wheels from 5/8" to 1 1/8" dia.