Torrington's selection of standard acid brushes are available in horse hair or nylon materials. The handles for these particular brushes are bright tin plated. The ferrule is double crimped and has a staple set to hold the filament securely in place. Typical applications for the horse hair and nylon brushes include being used for applying glue, soldering paste and other types of acidic applications. The most popular brushes from this particular line are the size 1 and size 2 horse hair acid brushes.