The T-H Marine Troll-Tamer Trolling Motor Stabilizer Lock is designed to securely hold the trolling motor in place to prevent damage to the trolling motor and boat. No more worries about inadequate hold down devices, the Troll-Tamer Trolling Motor Stabilizer Lock has been designed and tested in the nastiest conditions by top touring pros. The Troll-Tamer Trolling Motor Stabilizer Lock is machined from 300 Series Stainless Steel and assembled to endure even the roughest conditionsThe latest models, RMC-108-DP and RMC-109-DP feature a clamp on shaft bracket to work with the latest in digital, wireless bow mount trolling motors, including Minn Kota Terrova, Auto Pilot, Riptide models & Motor Guide Xi5.