J Dewey Rods, brushes and jags I use are all brass. Their bore guide for my rifle is not, but does not have metal composition. Terrific quality and the satisfaction of buying from a family-owned American company.
While I find their website is easier to understand for the more informed/advanced shooter, I get around well enough to have everything needed for exceptional cleaning of pistols, shotgun and rifle. Their customer service is sincerely helpful.