Izmanto, lai palielinātu caurumus ar serdi, urbtiem vai caurumotiem. Tie neurbs cietu metālu.
| Brand | F&D Tool Company |
| Cutting Diameter | 1.13 Inches |
| Finish Type | Uncoated |
| Item model number | 25111 |
| Manufacturer | F&D Tool Company |
| Material | High Speed Steel |
| Package Dimensions | 11.9 x 1.3 x 1.3 inches; 2.35 Pounds |
| Shank Type | Straight |
