The Carlson's Sporting Clays Choke Tubes for 12 gauge Beretta and Benelli Mobil Improved Modified systems are precision machined from 17-4 stainless, delivering tighter, more consistent patterns than standard choke tubes. Featuring a 25% larger parallel section, these choke tubes throw denser, more uniform patterns across a broader range of speeds and shot types, while a knurled end allows quick, tool-free removal between stands. The constriction is laser-marked on the end for easy reference, so you can confidently select the right tube for upland birds, clays, or waterfowl on any given day. Backed by a lifetime warranty, Carlsons Sporting Clays Choke Tubes are designed to withstand heavy use in demanding shooting environments and are compatible with lead, steel, copper-plated, nickel, Hevi-Shot, and buckshot loads, with the caveat that steel shot larger than BBS should not be used in choke tubes tighter than Full Constriction. These tubes are engineered to provide a longer parallel section than flush-mount options, delivering tighter, denser patterns and reliable performance with 12 gauge Beretta and Benelli choke systems. Country of origin is the United States.