These are cheap and you get what you pay for. Compared to the same in a Dremel brand, at a much higher price, they have a very short life. Single use at most/best. The bristles roll over very quickly and become useless.

Like many mentioned it sounded to good to be true, but in this case it was true. These brushes are a very close replacement to the Dremel 405 but at a fraction of the cost. When these wear out I will certainly buy more of these again! I love them.

I bought these cause they were quite a bit cheaper than the Dremel brand. But they dont hold up near as well.

Not quite as durable or well made as the Dremel brand ones, but for the price they are a steal.

I purchased these to use with a dremel to clean carbon build up off of a set of aluminum cylinderheads for a v8. While I was able to clean most of the carbon off of them, the wheels fall apart quickly, even at low speeds and pressure. They fail at the center of the wheel where the wires are held to the pressed metal. They simply fly out of the disk if you push a bit to hard. The same wheels from dremel last tremendously longer and actually break the wires. I wont be purchasing them again.

I use these for cleaning the piston bore on aluminum brake calipers from a motorcycle. Its soft enough to not damage the aluminum but still able to clean away any deposits. Its mounted in a Dremel, 1/8 inch collet, and used on low speed which is more than enough for cleaning. Instead of a brake cleaning fluid that evaporates quickly, a penetrating oil or WD-40 is used then the caliper is rinsed with brake cleaner. One brush was used for 6 calipers and still almost like new. It works great for the piston seal groove and dust seal groove thats narrow and hard to clean otherwise. Will buy again when needed.

Ive placed prior orders for the Dremel 428 but now find them to be far too expensive. Ive also tried other lesser known brands but they just dont last very long, with the tiny wires flying off all over the place. (Always use eye protection when using these brushes. Please.) So now Ive worn out 2 of the TEMO brand 428s and find that they are an excellent value. The TEMO quality and durability are comparable to the Dremel, but at a much more reasonable price. I use these a lot and Ill definitely re-order the TEMO. Highly recommended.

I used them on cleaning up the magnesium valve covers and they work fine. I used dremel first, but that overheats quickly, so, I use them with the RotoZip. They work, do not fray excessively (I only run them at 10000 rpm), maybe not as good as Dremel brand, definitely not as precise, but for the price, I think they give better value.

They worked good for me cleaning the inside of my outdrive on my boat. Even at the recommended speed I went threw them quickly

Very nice manufacturing on these, Ive seen others that were very rough.