When laying a boat up "on the hard", adjustable keel stands are faster and easier to set compared to hit-and-miss shimming with wood blocks.Stackable keel stand. Height is adjustable from 20"-32".More about Brownell boat stands Strong and sturdy, Brownell adjustable boat stands provide dependable support for boats stored on land.Sold as a complete assembly with top and bottom, these adjustable stands support and stabilize the weight of a boat on land. Every stand features easy-to-use handles for quick and secure adjustment. Stands are galvanized steel or thickly painted inside and out to resist rust. Full-length center pipes ensure stability and provide extra protection for the full-size 1 7/16" Acme threads. Powerboat Stands are designed to allow compact stacking to save space when not in use. Angle iron bases prevent damage to pavement. Angled Sailboat Stands are designed for sailboats and deep-V motorboat hulls. These stands can be nested for storage. A safety chain notch accepts 3/16" galvanized chain. Bow-heavy boats require a Vee at the bow. Flat style swivels support most hulls. Orange Replacement Tops are also available.Key FeaturesSupport and stabilize your boat on land with rust-resistant standsStack or nest for compact storageIndependently certified with a safe working load of 20,000lb.Superior welded construction with solid-steel, Acme-threaded adjustable rodSizes to fit virtually any boat; made in USABoat Stand Selector Chart