- Letter 'U' - 1/4" Heavy-duty grade stamps for hand-held hammer struck applications
- Marked with character designation and sign on thumb side
| Type | Stamp |
| Style | Hand |
| Size | 1/4" |
| Stamp | U |
California Residents: Prop 65 Warning
WARNING: Cancer and Reproductive Harm
www.p65warnings.ca.gov
| Type | Stamp |
| Style | Hand |
| Size | 1/4" |
| Stamp | U |
