Schmitt Control Knob WheelYour 'captain' spends 90% of his or her time at the wheel. Make this time more enjoyable and safer with a 'Control Knob' steering wheel from Schmitt. Large ergonomic control knob provides comfort and confidence in any boating situation. Available in 13.5'' and 15.5'' diameter sizes.Features of Schmitt Control Knob Wheel 1/..