DeoxIT(R) D-Series D5 Contact Cleaner & Rejuvenator | Adjustable Valve, 5ozDeoxIT(c) D Series contact cleaner is a fast acting deoxidizing solution that cleans, protects, lubricates and improves conductivity on all metal connectors and contacts. Use as a general treatment for connectors, contacts and other metal surfaces, and on non critical metal surfaces with severe oxidation and corrosion. DeoxIT(c) dissolves the contamination and protects the surface.