Formulated especially for bench rest shooters Bench Rest-9 is the standard by which all copper solvents are judged. Bench Rest-9 makes it possible for bench rest shooters and serious hunters to clean their bores of copper fouling overnight..instead of 3 or 4 days. Powerful safe and fast and contains no abrasives. It is also great for removing powder lead and plastic fouling from all shotguns pistols and revolvers.