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° F (-40 to 85° C). Pro Tie 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.