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F1 BORING SHANK:
| Model No. | Shank No. | Connect Thread |
| F1-BT | BT30 | 1-1/2"-18UNC |
| BT40 | ||
| BT50 | ||
| F1-NT | NT30 | |
| NT40 | ||
| NT50 | ||
| F1-R8 | R8 | |
| F1-MS | MS2W | |
| MS2 | ||
| MS3W | ||
| MS3 | ||
| MS4W | ||
| MS4 | ||
| MS5W | ||
| MS5 |
Among the Model No, of F1-MS , the MS and MSW repectively refer to MS taper with tang and MS taper with draw bar