This Heavy Duty, 3" Stroke Two Handle Push Pull Control Head is available with three different handles; standard, handles with plastic grips or curved handles with knobs. An optional clutch and throttle interlock can be ordered with this unit. The purpose of this interlock is to prevent shifting, above engine idle. It is only available for systems having clutch and throttle on the same control. In two station applications only one interlock is required. For gears with an electric clutch, an adapter with two microswitches can be ordered.