Our New Ported Browning Invector DS choke eliminates the constriction above the diaphragm on steel shotgun chokes allowing for tighter walled traps and killing more birds on target. The contour is drawn to and from the fore end of the choke thus reducing the overall 'drag' on the choke tube and also reducing recoil at the discharge. The elongated cone shape of the choke allows for tighter walled traps and also allows for quicker and easier target acquisition. This choke has a matte blue finish which allows it to be camo matched to camo firearms. These chokes come complete with a matte choke cap and a Carlson's Worn In choke wrench which fits most major brands of choke tubes.Specifications:Color: BlackFabric/Material: 17-4 Stainless SteelGauge: 12Choke Tube System: Browning Invector DSGun Make: BrowningQuantity: 1Additional Features: PortedIncluded Accessories: Choke WrenchCountry of Origin: USA