I am not sure what this is for (if anyone knows please let me know), they are dapped, with two circular indentations on the edge, and one straight edge as well. If soldered onto a flat backed item and the circular indentations sanded clean, I believe this might be good for a straight pinback or possibly chain. But that is just my idea.,
D-010,
Type of Metal - Copper, Brass, Bronze or Nickel Silver,
Grade of Metal - First Grade,
Gauge of Metal - 30 Gauge,
Measurement - 17.3mm x 18.1mm x 2.7mm deep,
Quantity - 6,
Materials: Copper.