This is a heavy duty Motor Bracket that is made of stainless steel and it comes with a solid polypropylene mounting board as pictured. This motor bracket is most suitable for 2-stroke motors up to 10 HP. This motor bracket is durable and it fits small to medium sized powerboats and yachts. Features: It is for 2-stroke motors up to 10 HP. Trolling auxiliary motors enable retractable bracket on power and sailboats with ease. Suitable for small to medium sized powerboats and yachts. Spring loaded, with 5 vertical position, adjustable bracket. Body of bracket made of anodized aluminum and it comes with solid polypropylene mounting board. Includes easy to lift and lower heavy duty springs. Specifications: Mounting Holes: 0.314". Mounting Area Dimension: 5 3/4" X4 1/2". Board Dimension: 7 3/4 x 10". Item Number: PS030100.