What it’s used for:
These are the replaceable "pins" that go inside a pneumatic needle scaler/descaler gun.
Main jobs:
1. Rust removal - The needles hammer at high speed to break off rust and corrosion from metal surfaces. Ships, tanks, steel structures use them a lot.
2. Paint/coating removal - Strips off old paint, scale, or coatings without grinding.
3. Welding slag removal - Cleans slag off welds after MIG/arc welding.
4. Surface prep - Gets metal clean before painting or coating.