IDEAL KNEEBOARD STORAGE – The Monster Tower kneeboard rack accommodates boards up to 4” thick. Each fork tang is inlaid with a flexible EPDM rubber for extra protection and flexible semicircle tabs to keep boards from rattling. QUALITY CONSTRUCTION – For durability, our combo rack is constructed of machined 6063 billet aluminum and bright-dipped anodized for extended life. Extra strength is provided by 304 stainless steel fasteners. UNIVERSAL FIT – This kneeboard rack fits towers with a 1-5/8” to 2-1/2” diameter thanks to the included plastic universal inserts. These inserts fit inside the mounting clamp. SUPERIOR SAFETY – A cloth-coated, UV-resistant elastic shock cord holds boards in place. A machined clamp and a four-point indexing system ensure that your boards are parallel to the water. EASY REMOVAL – This rack’s quick release cam lever allows you to easily remove the rack from your wakeboard tower at a moment’s notice without the need for tools. Each Monster kneeboard rack features a thick rubber bumper to protect your board and a flexible tab to reduce rattle, accommodating boards up to 4" thick. These racks also include a UV-resistant shock cord to securely hold the kneeboards, with adjustable fork spread for different board lengths. The quick-release mounting system allows you to remove the rack without tools for security, trailering, or docking in tight spaces. Just flip the latch to take off the rack, leaving the clamp attached to the tower for easy reattachment. The standard rack comes with a 2.5" diameter clamp. If your tower is smaller, simply choose the kneeboard rack with optional Universal Inserts to fit towers from 1 5/8" to 2.5". You can also purchase the popular Swivel Adaptor, for easy access to your board from inside the boat.