Magma Products, R10-626-20 Rail Mounted Removable Kayak/SUP Rack, 20" New 20 inch wide rack arms can now hold up to 3 Standard sup's 100% 304 marine grade stainless steel construction Fits straight and tapered, vertical or diagonal rails from 7/8" to 1-1/2" diameter Instantly adjusts without tools to fit kayak's, sup's, and other water toys; folds flat along rail when not in Use or easily Remove from rail without tools for compact storage Each arm has (2) heavy duty stainless steel rail brackets with adjusting knobs, (2) stainless steel tie-down loops, and pre-installed UV resistant protective foam padding