First in firearm maintenance - cleans, lubricates, preserves, synthetic based lubricant fortified with PTFE. Cleans bores, chambers, trigger assemblies and all mechanical parts. Lubricates mechanism with long lasting film for smoother, easier action with less friction and wear, never gummy or sticky. Preserves metal against rust and corrosion. Environmentally safe and user friendly. This 4 oz bottle is perfect for your bench or range bag.