Ultraflex single leveraction control to operate both throttle and shift marine engines. Ultraflex B103 Top Mount Controls are Suitable for any type of boats with outboard, inboard, or I/O power plants Boat Control Features: Ultraflex controls allow easy and safe shifting by preventing accidental gear engagement unless engine is idling Controls are made of chrome plated marine aluminum Pull-out handle disengages shift for warm-up Neutral safety switch prevents in-gear starting Built-in friction to avoid throttle creep