The Ultimate Auto Glass Removal Synthetic Fiber Cutting Cord 9 years after it was first released on the market, 8 prototypes, and countless years of testing, GT Tools is finally releasing the updated 2020 ZipLine Synthetic Fiber Auto Glass Cutting Cord to the world. 25% Stronger and 25% Thinner than the previous version. The New ZipLine™ is designed to completely eliminate auto body scratching great for European vehicles and softer urethane. - Tensile Strength: 450 lb (25% Stronger) - ThinTech Diameter: 0.9mm (25% Thinner) - SlickZip™ Extreme Abrasion Resistant, Slippery Coating ZipLine™ Available in 5-Pack 300ft spools.