revolving hole punch manufactured by C.S. Osborne
forged body
threaded, hardened, carbon tool steel punches, called “tubes”
reach from cutting tube to back of jaws 1¼″
sold with two combinations of tubes, “0-7” or “1-6”. See tube chart below.
replacement tubes, anvils, and springs available
Compare:
- C.S. Osborne No. 223, a cheaper, lighter-weight version
- C.S. Osborne No. 153, also forged, but just one tube
Available Tubes
| Number | Diameter | 0-7 | 1-6 | |
|---|---|---|---|---|
| 0 | 5⁄64″ | ≈1.984 mm | ✓ | |
| 1 | 3⁄32″ | ≈2.381 mm | ✓ | ✓ |
| 2 | 7⁄64″ | ≈2.778 mm | ✓ | ✓ |
| 3 | 1⁄8″ | ≈3.175 mm | ✓ | ✓ |
| 4 | 5⁄32″ | ≈3.969 mm | ✓ | |
| 5 | 11⁄64″ | ≈4.366 mm | ✓ | ✓ |
| 6 | 3⁄16″ | ≈4.762 mm | ✓ | |
| 7 | 13⁄64″ | ≈5.159 mm | ✓ | |