Description Use a number 8 or 10 screw to mount to a variety of surfaces, wood, sheetmetal and concrete. Use around the home, vehicles, shop or work. KT screw mount cable ties are made from strong DuPont 6/6 nylon material. This material yields a higher break points even at colder temperatures then the competition. Packaged in resealable bags to help preserve moisture and keeps ties organized. Higher moisterure gives most zip ties more tensile strength. UL listed. U/V ties can be used outdoors and indoors. Length is approximate. Specifications:4" bundle diameterU/V stable for indoor/outdoor use-40ÂF - 185ÂF75lbs break strength