Clenzoil® Synthetic Gun Grease is a high quality, synthetic grease specifically formulated to stay in place and protect under extreme heat and pressure. Clenzoil Synthetic Gun Grease is ideal for shotgun choke tubes, muzzleloader breech plugs, hinges on O/U shotguns, semi-automatic handgun slide rails, and any other metal on metal sliding surfaces. Clenzoil Synthetic Gun Grease reduces wear, eliminates stainless steel galling, and prevents seizing of threaded parts.