Properly securing -AN lines during assembly is vital to creating a leak-free union. The absolute best method for stabilizing your work during the tightening of hose ends is to use Mishimotos precision-designed -AN vise jaws. Mishimoto -AN vise jaws are constructed from soft aluminum material. This ensures the fitting surface will not be damaged during the assembly process. Our jaws work with most popular bench vise designs and feature integrated magnets to keep the jaws in place during use. Mishimoto -AN Vise Jaws feature a durable anodized finish to prevent corrosion and include our signature Mishimoto Lifetime Warranty.