Fiberglass Scratch Brush Pen - 3 Pack - Jewelry, Watch, Coin Cleaning, Electronic applications, Removing rust and corrosion

These are handy for cleaning up small electrical & mechanical parts.

These are great for cleaning electrical contacts, if need that sort of thing.

Good. Will purchase again.

Work okay, really have to work them to do anything as it is like a brush, not really good for removing solder mask unless you want to rub on it for several minutes. Build quality could be better, very flimsy feeling and the end comes loose often while using. Still works good for VERY light work if that is what you need them for

The glass fiber brushes are a useful tool to remove rust or other oxide layers from metals, clean up contacts, prepare metal or plastic surfaces for glue or epoxy application. The fiber tip is approximately 1/4 inch diameter allowing for precision work.You can modify the abrasive action of the pen by the length of the exposed fiber bundle (short equals more abrasive action, longer equals softer abrasive action).These pens have a long lasting supply of glass fiber that can be advanced by rotating the rear cap of the pen. That supply - for my use cases - lasts over six months.Overall, a very useful, well-made gadget to clean and (intentionally) scuff hard and soft surfaces. And the price is right.I will certainly buy more (in a few years, because these last a good while).Highly recommended.

I had a cartridge video game that I purchased with spots of corrosion on the games line of contacts. Made there by what kids do to appear to get the game to run, blowing on those prongs. But this is not how you clean, or fix a finicky game. But I used the fiberglass scratch brush, one of 3 included, and it really worked to clean off the spots of corrosion. Of course you need to realize using it on a delicate thin contact strip, could go right through rendering the high priced game rubish. But it worked well, very well. For a reasonable price I have 3 brushes that should last an eternity.

I use these to clean or burnish contacts and they work great providing a gentle polish.

I have used scratch brushes since the 1970s. The older brushes were of heavier construction, but no more effective than the new items. Use them to remove accumulated dirt from the back of watch cases before opening, or to clean the areas where the bands/straps attach to the watch case. There are many uses for these, not just for watches.