THREADED BUTTON BITS
Top hammer bits with R28 Thread
| Part number | Diameter | Buttons gauge | Buttons front | Flushing gauge | Flushing front | Body | Front |
| 28R38NF | 38mm | 5x9mm | 2x7mm | 2 | 1 | Normal | Flat |
| 28R41NF | 41mm | 5x10mm | 2x8mm | 2 | 1 | Normal | Flat |
| 28R45NF | 45mm | 5x10mm | 2x9mm | 2 | 1 | Normal | Flat |
28R38NF / 28R41NF / 28R45NF