The Midas touch. Our exceptional 12 gauge Midas Grade Invector-Plus Extended choke tubes are available in constrictions from Cylinder to X-Full. All Browning Invector tubes are set to industry constriction standards. – Extends beyond the end of the barrel for easy removal and installation – Stainless steel construction with black oxide finish – Laser-etched black chrome accent band – Minimum gap geometry plus high-resolution RMS finish reduce plastic buildup in bore – Available in constrictions from Cylinder to X-Full – Fits 12 gauge Invector-Plus choke system ONLY – Flat choke tube wrench is not compatible with Midas Grade Extended choke tubes – Invector-Plus choke tubes fit only Browning shotguns designed for Invector-Plus and are NOT for use in shotguns showing Standard Invector or Invector-DS on the barrel(s).