NO-M.A.R 4" Multi Purpose Polymer V Groove Barrel Vise Soft Jaws NO-M.A.R V Groove Polymer Vise Soft Jaws / CNC Machined From NO-M.A.R Polymer NO-M.A.R Polymer Protects Polished Metal Surfaces without leaving marks or scratches Fit in any 4" Vise with 4" wide jaws or larger / Extra Thick Soft Jaw Body for Added Strength! Great for light to medium duty holding power / Not for high grip rotational torque Made in The USA from US Materials! / Holds any non-tappered round stock or barrel