The Carlson's Coke Tubes Coyote Choke Tubes are made specifically with coyote hunters in mind allowing predator hunters to deliver devastatingly effective patterns at distances of 70 yards and more with larger sized shot. Made for use with Hevi-Shot Bismuth or lead the Carlsons Coyote Choke Tubes are high performance chokes that produce very dense patterns when utilizing T and Buckshot loads. The Carlson's Coyote Shotgun Choke Tubes are great for waterfowl and predator hunting and are available to fit a variety of shotgun models.Note: these choke tubes are NOT FOR USE WITH STEEL SHOT!