This unique Dewey U.S.G.I. M1 Garand Ratchet Rifle Chamber Brush 30-06 Springfield features a ratchet system that allows a cleaning rod to be attached sideways for use in semi-automatic chambers. No more bent rods or scratched receivers due to inappropriate cleaning tools. Brush works with 30-06 Springfield chambered Garands. Features.30-06 Caliber"No-Harm" Bronze BristlesRatchet Style BaseUse with M14-H Brass HandleM1 Garand Chamber Brush