Pro Tie Screw Mount cable ties are made from high strength and lightweight 6/6 nylon. Nylon 6/6 is a hygroscopic material, which absorbs and releases moisture, is non-toxic, and has a working temperature range of-40 to 185-Degree F (-40 to 85-Degree C). Our UV Black cable ties are UV stabilized for outdoor use. Using a 8 or 10 wood, sheet metal, or concrete screw, fasten the bundle directly to walls, panels, automotive chassis, or any other surface you desire.