That’s a Chicago Pneumatic CP857 Pneumatic Angle Grinder
What it’s used for:
This is an air-powered angle grinder. It uses compressed air to spin a grinding/cutting disc at high speed for metal work.
Common uses:
1. Metal fabrication & welding - Grinding welds, smoothing metal, removing rust
2. Cutting - Cutting steel, pipes, bolts, rebar with a cutting disc
3. Surface prep - Deburring, cleaning, and finishing metal surfaces
4. Industrial workshops - Shipbuilding, construction, auto body, maintenance shops