Park Tool CM-25 Professional Chain Scrubber Tool, Blue

This is shipped in a couple pieces, which assemble quickly and easily (they provide the Allen wrench). This is a chunk of metal, so it should last for years, even if used in a shop environment. It does clean the chain pretty well, though it does not remove all the grime from the open part of the links. Be aware that it will splatter the area underneath the chain, so take proper precautions so you don't have stained floors or surroundings. This also does not clean the front or rear cogs (it is a CHAIN cleaner), nor the derailleur, so you will have to clean those by hand. Still it makes the chain cleaning job easier. Also, rather than buying the Park chain cleaner solution, you can use a water and detergent solution (Dawn works GREAT) and save a lot of money.

How I ever lived without the ease of this for 30 + years I'll never know. Made cleaning sandy, grime off the chain, with a little degreaser, a breeze. Follow the instructions, and within minutes the chain is really pretty clean, more so than I could do with a brush and degreaser by far. Clean up afterwards of the Park Tool was easy, and then leave in the sun to dry. Seems very well made and particularly durable so it should last many years.

I had the cheaper Park Tool chain clearer for years. I think 3 or 4 of them broke. This time, I decided to try this one. It is very sturdily made, and I don't think it will ever break. I bought an extra set of brushes to be sure. The thing I like the best is that I don't have to clip each end to the chain. Just push the lever down and it is ready to use.

This tool body is nice casted aluminums, design is very nice, first use, the chain is very clean, and I can confirm little detergent that falls out while in use,The cartridge pad/brush looks poor compare to the body specially these foam pads flying off everytime you open it.Handle is fine, this part could certainly be improved by adding an adjustable bracket to be installed on the frame of the bike, and using a dummy.

This product is as good or better than described. My chain was clean after 1-2 passes. I am compulsive about my chain and my old plastic system took 6 or 7 passes at 50 repetitions/revolutions each time to have the solution mostly clean, albeit not perfect. The residual solution would still be slightly dirty. The park professional chain cleaner after 1-2 pass (and only 30 reps) the chain looked brand new and the residual solution clean. An additional rinse showed NO dirt. Ok, its more expensive than a comparable plastic product but its worth it. You will never replace this, no plastic pollution in the trash dump, and everything internally is easily replaceable. You cant go wrong with this product. I did not use their(Park Tools) dummy hub as it does not fit disc brake bikes.1/15/2020-(UPDATE) My opinion has not changed since my original review. This tool is EXCELLENT. I love cleaning my chain. Its is easy, and cleanup much more reasonable. The only compliant I have is I wish they would include some extra cloth and foam inserts that go into the head of the unit. They can fall out when you open the device and you have to be careful or you will lose them. It would be nice to have extra. I love this tool. You cannot go wrong, and if you love a clean chain, you will love this. Also, I changed my chain recently(campy) after 6657 miles. Clearly riding on a clean chain contributed to the long life of the chain.

I've gone thru a few plastic chain cleaners ($20~30) in my time. After some quick math it turns out I should have just saved myself some money and just gotten this METAL version first. Yes it is expensive but it will not break, and you can replace the brushes if needed. No you cant see thru it, but even with heavy use it should last the rest of my life.

I have used the plastic version of this also (CM-5.2). Neither is fool proof, nor perfectly clean to work with, but the metal one (CM-25) is somewhat easier to handle overall and is not influenced so much by the movement of the chain through the device. With the handle attaching a little more firmly the CM-25 is also easier to set down and leave without attention to it being knocked over. This device seems to work a little bit better than its lesser priced plastic version. For badly greased/oiled chains it may take a few more passes through, but overall, with a good cleaning regimen this can help keep chains clean and efficient.

This unit operates like the older, traditional Park Tools chain cleaner. Biggest difference is that the shell is now metal, not plastic. Price has gone up, but so has the life expectancy of the tool. My past history with the plastic models entailed several replacements when different parts would break (eg handle).