The 100 Straight CSP Stuck Choke Tube Tool removes severely stuck tubes without damage to choke or barrel. Rod fits through barrel; heavy spring pressure clamps head into tube notches. Hex-end head lets you use a wrench for lots of leverage to easily unscrew the tube. Adjustable, works with any length barrel. Available with one of four interchangeable heads.Head Type Choices:#1 Head Fits Invector, REM-Choke, WIN-Choke, Valmet, Ruger, Bernadelli, Zoli, SKB, 4-Notch#2 Head Fits Colonial Tru Tube, Weatherby, SKB 2-Notch, Mossberg, Perazzi Flush Tubes#3 Head Fits Beretta and Benelli#4 Head Fits Briley ThinwallFeatures2- piece rod fits through barrel; heavy spring pressure clamps head into tube notches.Hex-head end allows use of a wrench for more leverage to easily unscrew tube.Adjustable, fits any length barrel