Makes The Job "Precision" And Not By "Guess"
For EXACT centering of bore of rifle barrel to the lathe - whether the barrel outside is concentric with bore or not. The only perfect way to setup for barrel turning or truing, muzzle crowning, barrel threading or chambering. Made of ground hardened steel; spring-loaded on tailstock end. An excellent lathe accessory for the professional gunsmith.
Big Book Catalog, Issue:68, Page:488
SPECS: 1/2" (12.7mm) diameter. 7" (17.8cm) long. Fits up to