This is a Hand Riveter (specifically the Jadever 253mm / 10.5" model), a manual tool used to join two pieces of material—usually sheet metal—together using blind rivets.
It’s a staple in automotive repair, HVAC work, and general DIY projects because it creates a permanent, vibration-resistant bond where you can only access one side of the material.
Located at Mozart Bet Building First Floor Shop 25