I got this gun cleaning kit recently. I am a gun collecting lover so I collected many guns. In order to protect them, I will often clean them. This gun cleaning kits are made of pure solid brass. Not only their spear-pointed Jags,slotted patch loops,accessory adapters, but also their cleaning rods and cleaning brushes. Becuase the brass can minimize the damage to the gun barrel surfaces. i never use plastic or copper or bronze gun cleaner kits, can possibly ruin the gun barrel.After all, I spent a lot of energy and money collecting these precious guns. I would try my best to protect them.