Our Extra-Duty Ty-Raps are designed to fasten your windscreen securely to your fencing. This Ty-Rap is rated for 120 lb. breaking strength. Most of our clients use Extra-Duty Ty-Raps to secure windscreen along the top of the fence and then use Standard 8" ties to secure the sides and bottom of the windscreen. We do not recommend using Extra-Duty Ty-Raps on all 4 sides of a windscreen as these ties will prevent the windscreen from breaking free in heavy winds. This places extreme pressure on your fencing. Extra-Duty Ty-Raps are sold in 100 count bags.