Profile: Roloff Manufacturing Corporation specializes in gray iron castings and products. We produce a broad line of custom castings for our industrial customers. Our marine products include boat anchors, anchor lifts, mooring arms, mooring anchors, trolling weights, dock fittings, dock cleats, dock decking, and duck decoy anchors. Other gray iron products include castings, barbecue grills, fitness equipment, drainage grates, commercial augers, and hardware equipment. All of our anchors are made of cast-iron semi-steel with a minimum of 30,000# tensile strength. They are finished in aluminum, powder coated, or vinyl coated. We produce vinyl-coated anchors with a thicker, more durable coating that won't peel off. It is resistant to rust, salt water, gas, and oil. It deadens the sound if dropped in the boat and will not mar the finish of the boat. Our boat anchors range in size from 5 to 40 pounds to fit all anchoring applications. Supreme coated bonded vinyl plastic anchor comes in a variety of colors. For use on muck, sand and weed bottoms, it has excellent holding power in stone & gravel as well. It's quiet and practical.