Brush Research ® for Rotors, Medium Grit (120), RMFH120Z25 (Pack of 1)

good product

I wish I bought more at the time when they were $39. I use it to remove pad material from drilled rotors after track days. It works, but be prepared to spend a lot of time and effort on them. I definitely recommend using a corded drill as it takes about 20-30 minutes per side per rotor. I go through one rotor hone after about 4-5 rotors.

It got the job done (deglazing brake rotors). Not the same effect as turning a rotor but certainly broke the glaze and provided a good surface on a relatively new rotor for new set of pads. I had pads on that I didn't like and was replacing and wanted a "fresh" surface. It was also helpful to remove some rust as well as resurface the inside parking brake surface. After 4 rotors it did show a lot of wear and one of the "balls" came off. I think I might get one more use (4 rotors) out of it before it is worn-out. I would buy it again to avoid paying to have rotors turned on car or off (take to machine shop). A few notes: rotors must be removed from car as the dust shields do no permit treating both sides. Best (but not required) to use a corded drill as the process will burn through your battery quick on a cordless. Have brake cleaner (spray) on hand for cleaning the surface after/during using.

Works really well

This did a nice job of resurfacing my motorcycle rotors. I was able to do 4 rotors and likely can do more yet. I did chuck the rotors in a mill and spin the mill while I used a cordless drill to run the hone on the rotors surface. The process took some time but the results were worth it.My only complaint is that these are fairly expensive. I would expect them to be about 1/2 the price they are. Then again it is much cheaper than a set of rotors.