That’s a Straight Die Grinder — looks like a generic/industrial version, similar to the Bosch GGS 27 you sent earlier
What it’s used for:
High-speed grinding, deburring, polishing, and carving in tight spots. Basically the same job as the Bosch: metal work, weld cleanup, porting, mold work.
Key details from your photo:
1. Type: Corded straight die grinder
2. Body: Dark blue/gray slim housing - made to hold like a pen for control
3. Collet: Has a grinding bit/stone already mounted. Usually takes 6mm shank bits
4. Vents: Cooling slots on the side for the motor
5. Box in background: Looks like it came in a cardboard box with accessories