Fits any board up to 4" thick Fits ANY tower 1 5/8" to 2.5" diameter with universal tower inserts Made with strong 6063 aluminum and 303 stainless steel components and fasteners Long lasting brushed, bright dipped anodized finish Thick rubber bumper protects boat and boards UV resistant heavy duty shock cord holds boards safely in place Adjustable fork to accommodate any length board--16.5" max spread Includes quick release mechanism for easy removal Guaranteed silent