The Carlson's Flush Mount Skeet Choke Tube for Remington 20ga .615 is crafted from 17-4 heat-treated stainless steel to deliver rugged performance for Rem Choke shotguns. This choke tube reconciles durability with consistent constriction, offering reliable performance in skeet and field shooting alike, and its backed by Carlson's lifetime warranty and Made in the USA craftsmanship. When using steel, lead, or Hevi-Shot, shooters should note that all constrictions support these shells with the listed exceptions: steel shots larger than BB or speeds over 1550 fps are not recommended in choke tubes tighter than full, and steel shot larger than #4 is not suitable for Turkey choke tubes. The Flush Mount design ensures a clean, streamlined fit that integrates smoothly with your Remington system, while the .615 constriction provides an ideal balance of tolerance and pattern density for practical shooting scenarios. Carlsons attention to material integrity and tight tolerances translates into dependable performance, making this choke a solid choice for upland and sporting clays enthusiasts who value precision, longevity, and American-made quality.