Work well. They have a nice rounded loop on the lead end, as opposed to Tipton that clip the end and leaves 2 sharp points.
These 12 gauge bronze brushes and bore mops are an excellent buy. Especially compared to what gun shops charge for a single brush or mop. The brushes fit nice and tight, and the mops are very absorbent, and are great for oiling the barrel after cleaning. I shoot Trap every weekend, and am always cleaning my shotgun. I will be buying more.
Absolutely the weirdest shortage I've seen in the last year of utter chaos was the COMPLETE absence of 12ga. bore brushes in local stores, either gun stores or big box retail stores. This was pretty much my ONLY option. It did the job merely by existing.