Birchwood Casey Choke Tube Lube - Prevents stuck choke tubes caused by corrosion, high stress of steel shot loads, extreme temperatures and pressure from repeated trap and skeet shooting. Withstands heat and prevents seizure even at extreme temperatures up to 2000 Farenheit. Provides maximum lubrication against friction and excellent corrosion protection from rain and salt water. Anti-seize lubricating compound guarantees ease in choke tube insertion and removal for all regular and stainless steel tubes. Excels as a universal lubricant and eliminates galling on stainless steel. Excellent for use on muzzleloaders, breech plugs and nipples to prevent seizing. Prevents stuck choke tubes, also works great for muzzleloader breech plugs and nipples to prevent seizing.