That’s a pack of Carbon Brushes for power tools
What they’re used for:
Carbon brushes carry current to the motor’s commutator in brushed motors. They wear down over time. When they get too short, your drill, grinder, polisher, or saw will start sparking, lose power, or stop working completely. You replace them as a pair.
What I’m seeing in your pic:
1. Brand: Says “BOSCN” with “Invented for life”
2. Packaging: “Genuine Spare Parts”
3. Parts inside: 2x rectangular carbon blocks with braided copper wire + spade terminals