All Rite Products Single Pack Rack Black. The aircraft grade aluminum blocks attach to handlebars and any tubular or square bars or railings 1/2" to 1 in diameter. The internal steel cores are covein thick soft rubber. Rubber straps attach over the holder for added security. Full 360 degree rotation allows firm grip of different sized objects by simply twisting the holder and locking the wing nut. Specifications for All Rite Products Single Pack Rack: Manufacturer: All Rite Products Archery Application: Archery Color: Black Package Contents: All Rite Products Single Pack Rack All Rite Products PR1: Single Pack Rack Black