Birchwood 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. It can withstand heat and prevents seizure even at extreme temperatures up to 2000f. It also provides maximum lubrication against friction and excellent corrosion protection from rain and salt water. This anti-seize lubricating compound guarantees ease in choke tube insertion and removal for all regular and stainless-steel tubes. It excels as a universal lubricant and eliminates galling on stainless steel.