Carlson's choke tubes are among the best in the business, and provide dependable service for a lifetime to their owners. High quality steel, and tight tolerances ensure the best possible patterns in all of your shotguns. Ported and ideal for very tight long range patterns, particularly when hunting coyote For use with Hevi-Shot, Bismuth or lead, this high performance choke tube has been specifically designed for the coyote hunter to deliver devastating downrange patterns upwards of 70 yards when shooting larger shot sizes. Produces very dense patterns when utilizing T and Buckshot loads Specifications and Features - 12 Gauge ported coyote choke tube - Stainless steel - Not compatible with steel shot Fits: Mossberg 500, Winchester, Browning Invector, Weatherby, and Savage 12 Gauge Shotguns.