Add this TiptonA(R) Best Rifle Bore Brush Set to your gun cleaning supplies and you'll always have the right brush for the job. Durable storage case includes marked cavities to keep your brushes organized and easy to grab. Includes brushes for firearms from .17 to .45 cal. (does not include .20 cal) Corrosion-resistant bronze brushes meet or exceed mil spec 20% more bristles than standard brushes All brushes have 8 x 32 threads except .17 caliber which has 5 x 40 threads Durable, hinged storage box with caliber-marked cavitiesPlease Note: Tipton recommends that these brushes be used only with a quality 1-piece rod and with an appropriate bore guide Order today!