C.S. Osborne No. 491 / 492 / 493 / 494 Thonging Chisel
The Osborne thonging chisel listed here is made from high grade tempered tool steel. Best possible quality for long life. For making slits in leather for lacing, cutting out designs or slits for pronged hardware and many more applications.
Available here with 1, 2, 3 or 4 Prongs – 1/8″ (3.2mm) width between prongs.
Sizing Chart Below
| Osborne No. | Description | Width Between Prongs (“) | Width Between Prongs (mm) | Tool Width | Weight |
| 491 3/32 | 1 Prong | 3/32 | N/A | 2.3mm | 56g |
| 491 1/8 | 1 Prong | 1/8 | N/A | 3mm | 56g |
| 492 3/32 | 2 Prong | 3/32 | 2.4mm | 7mm | 56g |
| 492 1/8 | 2 Prong | 1/8 | 3.2mm | 9mm | 56g |
| 493 3/32 | 3 Prong | 3/32 | 2.4mm | 12mm | 56g |
| 493 1/8 | 3 Prong | 1/8 | 3.2mm | 16mm | 56g |
| 494 3/32 | 4 Prong | 3/32 | 2.4mm | 17mm | 56g |
| 494 1/8 | 4 Prong | 1/8 | 3.2mm | 22mm | 56g |
