Specifically designed for TSS loads that have become very popular with turkey hunters but will also shoot super tight patterns with HEVI-Shot Copper Plated and Lead Shot. This extended choke tube allows for easy installation without the use of tools. - Clean the threads in the muzzle and on the JellyHead TSS choke tube before installing. Use a good choke tube grease to coat the threads before installing. - Screw the tube into the muzzle be careful to not cross-thread. Grip the knurled end and hand-tighten only. No tools needed. - DO NOT OVER TIGHTEN. - Check tightness of tube every 3 to 5 shots to ensure a tight fit. - Not to be used with Steel Shot.