Forespar Performance Products Lock Box Tiller. Install one into your cockpit coaming and you have it in minutes.Cut-out dimensions: 3-3/8w X 4-3/4h X 1-1/2d. Specifications for Forespar Performance Products Tiller Lock Box: Manufacturer: Forespar Performance Products Color: Black Package Contents: Forespar Performance Products Tiller Lock Box Forespar Performance Products 100000: Lock Box Tiller