HellermannTyton standard cable ties feature inside serrations providing a positive hold onto wire and cable bundles. The head design guarantees high tensile strength, as well as a low insertion force. The bent tail design allows quick and simple installations by hand. For high volume applications, tensioning tools are availableto ensure consistent and safe installation. Standard Cable Tie, 4" Long, 18lb Tensile Strength, PA66, Black, 100/pkg.