Every toolbox needs a good cleaning brush. Bronze bristles softer than steel, minimize scratching, but are still firm enough to move debris.
It's hard to find a good one that's not disposable. Ours is US made, with a plywood handle, and bronze (C51000) bristles. This material is much harder, tougher, and fatigue resistant than brass but still gentle compared to steel. You'll get years out of one. There are 3 wide x 7 long bristle bunches hand tied with stainless wire, in a toothbrush shaped handle for knuckle clearance. Each tool wears a burned, "Wheel Fanatyk" logo for good luck.