The Forney 60463 Victor Style Oxygen Acetylene cutting tip features a copper shell machined from solid bar stock (not tubing). Thick shell flange. Extra heavy duty shell end where the tip takes the most abuse. Larger diameter decreases preheat time, maintains the cut on painted or rusty plates. Course 'V' splines which cuts better, resists clogs and makes cleaning easier. Made in the U. S. A. Forney Industries is one of America's longest operating family-owned metal working product companies.