Accessories
| Core Bit Extensions |  |
 |
MK Diamond's Core Bit Extensions offer a quick, easy and low cost way to achieve greater drilling depths with core bits. The 12" tube extensions thread into our standard or professional core bits. Multiple tube extensions may be used extending the drilling depth in increments of 12".
| Diameter | Length | Wall Thickness | Nut | Part # | |
| 1-1/4" | (32mm) | 12" | 2.0mm | 5/8"-11 | 168451 |
| 1-3/8" | (35mm) | 12" | 2.0mm | 5/8"-11 | 168450 |
| 1-1/2" | (38mm) | 12" | 2.0mm | 5/8"-11 | 168452 |
| 1-3/4" | (44mm) | 12" | 2.0mm | 5/8"-11 | 168453 |
| 2" | (51mm) | 12" | 2.0mm | 1-1/4"-7 | 168454 |
| 2-1/4" | (57mm) | 12" | 2.0mm | 1-1/4"-7 | 168455 |
| 2-1/2" | (64mm) | 12" | 2.0mm | 1-1/4"-7 | 168456 |
| 3" | (76mm) | 12" | 2.0mm | 1-1/4"-7 | 168457 |
| 3-1/4" | (83mm) | 12" | 2.2mm | 1-1/4"-7 | 168458 |
| 3-1/2" | (89mm) | 12" | 2.2mm | 1-1/4"-7 | 168459 |
| 4" | (102mm) | 12" | 2.5mm | 1-1/4"-7 | 168460 |
| 4-1/4" | (108mm) | 12" | 2.5mm | 1-1/4"-7 | 168461 |
| 4-1/2" | (114mm) | 12" | 2.5mm | 1-1/4"-7 | 168462 |
| 5" | (127mm) | 12" | 2.5mm | 1-1/4"-7 | 168463 |
| 6" | (152mm) | 12" | 2.7mm | 1-1/4"-7 | 168464 |
| 6-1/4" | (159mm) | 12" | 2.7mm | 1-1/4"-7 | 168465 |
