Expand your master gun vise with project-specific jaws; A secure grip on suppressors, PVC and cast-iron pipe, and all types of tubing, and are two-sided to best fit the application; For delicate items such as suppressors; The non-marring, soft jaws apply ample gripping and torquing power to loosen the tightest fits without damaging your investment; For tough jobs when marring is not an issue, such as with cast-iron pipe or steel tubing (reverse the jaws to the steel side); Secure cylindrical objects with a vise-like grip; Holds up to 3.75" diameters effectively