Iver Johnson X-Full Choke Tube Features The Iver Johnson X-Full Choke Tube is machined from stainless steel and set to an extra full constriction producing the tightest practical shot pattern for extended range shooting with a .410 bore shotgun. Its Mobil choke style thread pattern allows direct installation into compatible .410 barrels without additional fitting. Stainless steel construction stands up to repeated exposure to weather and handling in the field. This tight constriction makes the tube well suited to small game and turkey hunting where pattern density at distance matters most. The extended profile protrudes slightly past the muzzle giving an easy grip for hand-tightening or removal between hunts. This design also makes it simple to visually confirm which choke is currently installed before heading afield. Because it uses the widely available Mobil thread pattern it fits a range of .410 shotguns built around that system. The Iver Johnson X-Full Choke Tube is a dependable upgrade for hunters chasing tighter more consistent patterns. Iver Johnson X-Full Choke Tube Specifications Manufacturer: Iver Johnson Model: X-Full Choke Tube Gauge: .410 GA Choke: Extra Full Profile: Extended Material: Stainless Steel Thread Pattern: Mobil Available At: GrabAGun