The Trulock Waterfowl Choke Tube Set contains a selection of popular Precision Hunter to cover your waterfowl shooting needs. The 2 piece choke set contains the Precision Hunter in Improved Cylinder and Modified. The 3 piece set contains the same Precision Hunter chokes as the 2 piece, but with the addition of a cylinder choke for close range such as timber. The waterfowl sets also includes a choke tube case.Trulock Precision Hunter style choke tubes are the ultimate in a hunting style choke. They are manufactured from high-quality heat treated stainless steel and steel shot may be used from cylinder through improved modified. FeaturesMaterial: 17-4 PH grade stainless steelCNC machined from solid bar stock and heat treated.Knurled for easy installation and removalBlack oxide finish to reduce glare