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. Four interchangeable heads are sold separately. This tool is only the rods, for users who already own the interchangeable heads, or simply want to buy this and the head they will use most, separately.Head Type Choices (Sold separately):#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