The high profile RCH Locking Legs are designed with a key locking system to reduce wind resistance and increase security.The high profile RCH Locking Legs are designed with a key locking system to reduce wind resistance and increase security. This unique design helps reduce noise without compromising durability and load carrying capacity. Removeable and easy to install Locking cover with a compartment for an Allen key Suits Vortex, Heavy Duty Bars and Pioneer Systems using various QMFK spacers High profile 52mm / 2.05'' (low profile also available 37mm / 1.46'') Height adjustable using various QMFK spacers Suitable for heavy off-road use Tested and approved to Australian Standards AS1235-2000 Comes with 4 legs Assorted nuts and bolts for assembly Attributes: Leg Height, 52mmFits Bar, Thule Aero, Thule Wingbar (Blade), Vortex, Prorack Whispbar HD, Carac, Rola Heavy Duty, Hubco, Yakima, Mont Blanc (square bar), Thule, Prorack P, Thule square bar, Heavy Duty, Rola Sports bars, Euro, Yakima, Prorack WhispbarFits Accessory, Steel Mesh Platform, Roof Boxes, Steel Mesh Basket, S510 Fixed J Style Kayak Carrier, S512X Extension Piece, Nautic 581, List Accessories, 566 Ski & Snowboard Carriers, 562 Ski & Snowboard Carriers, 560 Kayak & Canoe Carrier, S512 Folding J Style Kayak Carrier, Nautic 570, Nautic 580, List parts that will need fitting kits, Nautic 571, 564 Ski & Snowboard Carriers, AT Trays, S400 Kayak & Canoe CarrierInstructions - RCL-RCH