Formulated especially for bench rest shooters Hoppe's Bench Rest 9A(R) 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 three or four days. Bench Rest 9 is powerful safe and fast and contains no abrasives. And although the solvent is essentially a coper-buster it's also great for removing powder lead and plastic foulings from all rifles shotguns pistols and revolvers.