Pro Shot 10-cc Syringe Choke Tube Lube Easy to apply Syringe, takes the mess our of application Superior anti-seize lubricating compound prevents stuck choke tubes and breech plugs, makes cieaning and changing a snap Apply to threads and wipe off excess after screwed in, with our anti-wear and propriertary additive package, your next change will be easy All Pro Shot products made in USA from USA components