Pixiss Scratch Brush Pen Set With Replacement Tips, Fiberglass, Steel, Brass, Nylon, 5-inches Pen Style Prep Sanding Brush 4-Pack For Corrosion, Rust, Jewelry, Circuit Boards and Auto Body Work

The Steel and Brass bristles work as well or better than the fiberglass bristles for my purposes, and dont have the hazards of fiberglass. I win.

Awesome set of brushes!!!

This has a nice variety of bushes of different materials. I never used a product like this before and may have had too high an expectation for its effectiveness. It helped but didnt do the job I had hoped for. It is worth the money to have on hand.

Maybe the steel and brass pens are.. Ok.. Kinda.. But the fiberglass does nothing, Nothing at all. Wont even scratch a PCB. Youll regret the purchase if PCB solder mask removal is at all why you are purchasing,. GOOD LUCK.

Had some rust build up this is a great product to remove it since you can target a thin line without being invasive to the surrounding areas that are not damaged

Works as described. I mostly use the fiberglass pen on motherboards and it barely flake off any fibers, does an impressive job being accurate

The red one/ fiberglass does not work in my kit. Dont know if this is normal just my experience.

My husband was excited to get these. Not sure what his use for them will be but he has big plans!

fast and graet service

Was looking to replace fiberglass pen from as far back as Radio Shack. Liked the pen function so decided on this set. Metals (brass and steel) are too thin to be practical.