8 Pieces Scratch Brush Pen Set, Pen Style Prep Sanding Brush With Steel, Brass, Fiberglass, Nylon Replacement Tips for Jewelry, Watch, Coin Cleaning, Electronic Applications, Auto Body Work

No instructions. Tips seem hard to change, and unsure as no instructions.

works for a few jobs then just toss them....... china JUNK ..not built to last

Works as described no issues

Great for woodworking Ive already given some to my friends

I wanted a fiberglass pencil to clean electrical contacts and this set had several materials other than the fiberglass. That said, i have used the fiberglass and the steel wire variants…. One to clean a network connector and the other to clean corrosion off the contact in a grill igniter. The steel one worked great. The fiberglass is a tad soft and it does work….but i have had one in the past that was about 20% stiffer and in general was better. Overall you cant go wrong and they give a couple extra inserts. Worth the purchase!

I really only wanted this for the brass and fiberglass tools, but the extra inserts were worth buying the set. This allows me to get the final detail done on ancient coins before waxing, and allows for more precise cleaning.

Works great to clean watch braclets and inside the watch case.

What can you really expect for $4.25 each, have low expectations and just consider them disposable....

as describe

Fantastic idea I havent used yet seem to be a little flimsy might break easily I purchased to clean corrosion out of AAA battery compartments on camera equipment. I love the way you can extend and retract the brush Not sure how the plastic will hold up with electronics cleaner spray might melt or the metal tip hold up with simple green or other water based cleaner might rust