Browning's exceptional .410 bore Midas Grade Standard Invector Extended choke tubes are available in constrictions from Skeet to Full. All Browning Invector tubes are set to industry constriction standards. This choke tube extends beyond the end of the barrel for easy removal and installation. It features a stainless steel construction with black oxide finish and laser-etched gold accent band. Minimum gap geometry plus high resolution RMS finish reduces plastic buildup in the bore. It fits .410 bore standard Invector choke system ONLY. Flat choke tube wrenches are not compatible with Midas Grade Extended choke tubes.