The Brownells Revolver Range Rod is a diagnostic tool to check revolver barrel and cylinder alignment, and for professional service inspections.
It features interchangeable heads for different calibers, with a knurled grip handle and heads made of steel hardened to Rc 52-54.
Various kits are available, including a Master Kit with multiple heads for calibers ranging from .17 to .45, and a Match Kit with a selection of heads excluding .38/.357 Service and K-22.