Carlson's Cremator Ported Choke Tubes include a long-range choke and a free wrench, ensuring you're equipped for various hunting scenarios. TST technology facilitates a stair-step-like transition to the final constriction, minimizing pellet deformation and generating a consistent pattern. The ported design reduces muzzle jump, allowing you to maintain aim for follow-up shots. The mid-range choke is ideal for distances between 20 and 40 yards, while the long-range choke offers excellent consistency beyond 40 yards. Carlson's Cremator Ported Choke Tubes are compatible with lead, steel, and Hevi-Shot loads.