- Tempered steel, hole for hanging
- Deeply etched lines and black filled figures
- 10-6154 is marked upper edge on both sides; one side 8ths, other side 16ths; opposite sides measure from opposite ends
- 10-6158, 10-6160, 10-6162 are marked both sides, both edges; upper edge 8ths, lower edge 16ths; opposite sides measure from opposite ends