Prevents stuck choke tubes caused by corrosion, high stress of steel shot loads, and extreme temperatures & pressure from repeated trap and skeet shooting. Compounded from fine metallic particles of nickel, aluminum and graphite into a non-evaporating lubricant that will withstand heat and prevent seizure even at extreme temperatures up to 2600Adeg F. Provides maximum lubrication against friction and excellent corrosion protection from rain and salt water.