.036 ZZ Pin Gage - Vermont Gage - Made In USA
Used to determine if the interior of a Vent Liner has opened to the point it should be replaced. If pin passes through, replace the vent liner
Used to determine if the inside diameter of a vent liner has opened enough (.036" or larger) that it should be replaced. If this pin passes through, replace the vent liner. Made in USA by Vermont Gage.
Many uses for measuring holes/orifices beyond muzzle loading (automotive applications, etc).