HeviShot Dead Coyote Choke Tubes have been bulit to put maximum lethal pellets on your target. Shoot with confidence. You know you are shooting 100% HeviShot performance. Chokes featuere ported, knurled fore end for easy installation in the field under any condition without tools. The porting drops gas pressure a the muzzle therefore helping ease the wad away from the shot, reducing recoil and dampen muzzle jump. Features internal axial rings to keep the shot cloud on the target. The HeviShot Dead Coyote Choke Tubes are constructed from aircraft stainless steel for years of carefree use. EVERY SHOT EVERY TIME!