Made in Bradford, England, Bowers setting rings allow for fast, efficient accuracy setting of any of any of the Bowers’ XT bore gauge ranges, including XTA, XTD and XTH.
| XTR3i | 0.1000 | POA |
| XTR5i | 0.1600 | POA |
| XTR7i | 0.2000 | POA |
| XTR8i | 0.3125 | POA |
| XTR12i | 0.500 | POA |
| XTR20i | 0.750 | POA |
| XTR35i | 1.375 | POA |
| XTR65i | 2.625 | POA |
| XTR80i | 3.250 | POA |
| XTR125i | 5.000 | POA |
| XTR175i | 7.000 | POA |
| XTR225i | 9.000 | POA |