Polar Hardware # 191 Flexible Rubber Holddowns. Complete With Brackets For Vertical Or Horizontal Mounting. Impervious To Weather, Oils, Chemicals And Dirt. No Mechanical Parts To Wear. No Springs To Stretch Out Of Shape. Will Not Scratch Painted Surfaces. Easily Installed Flexible Rubber Catch Compensates For Misalignment. Never Requires Lubrication. Individually Packaged. Brackets Are Zinc Plated.