Jelly Head Choke Tubes are crafted with the most demanding turkey hunters in mind. This extra-long extended choke is CNC milled from chrome alloy steel. They are designed to increase the range and pattern density of HEVI-SHOT, copperplated lead or regular lead. The fluted ports allow gases to vent quickly behind the load of shot instead of blowing through it and causing pattern distortion. The ports also help reduce felt recoil and muzzle jump. These screw-in turkey choke tubes have a knurled end, which extends beyond the end of the barrel for easy installation and removal without the use of any tools. Jelly Head Choke Tubles have a 90% pattern density at 40 yards.