The Hyper Tough Battery Terminal and Post Cleaning Brush cleans battery posts and terminals of corrosive build-up. Internal and external wire brushes are built into the rugged steel case. The external brush cleans cable clamps, and the internal brush cleans terminal posts. It is housed in a rugged steel case for durability. The included cap protects both the user and brush heads. Hyper Tough Battery Terminal and Post Cleaning Brush * Removes Corrosion and Dirt from Battery Terminals and Cable Clamps * External Brush Cleans Cable Clamps * Internal Brush Cleans Terminal Posts * Rugged Steel Case for Long Life