Precision extruded from aircraft grade aluminum and bonded with non-marring urethane.
The urethane coating is specially designed to provide a protective layer for the barrel's finish while providing extraordinary gripping abilities. Three different barrel openings of .85"e;, .66"e; and .53"e; will accommodate anything from an extended pencil barrel up to a bull barrel.
When inserted in a vise the urethane coating squeezes down tightly on the barrel to fully secure it for the forces needed for installation/ removal.