Rubber over-molded flexible nylon construction.Fit Type: Universal Fit Offset configuration to maximize rack space Mounts to tubular or square bars from 5/8”- 1-1/4” in diameter or to flat, drillable surfaces Utilize Rhino grips in any vehicle! They are designed to fit ATVs, UTVs, RVs, SUVs, trucks, trailers, pretty much anything that has a smooth surface! 4-corner bolting system Double version has 15 lbs. weight capacity and includes 4 rubber straps Sold as a pair Easily secure your light-weight gear to any vehicle, wall or flat surface.