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Unconditional Satisfaction GuaranteeNo Shipping Fees Above 302 Months to Decide. Returns Simplified.Diamond core drill bit extensions are used to quickly and easily achieve a greater depth when drilling with a core bit. You can attach multiple extensions to achieve 14″.
| Description | Thread | Fits Bit Size | Part Number | Catalog Number | |
|---|---|---|---|---|---|
| 4″ | 125-4 | 1.250″-7 | 1-5/8″ & up | 01863 | |
| 4″ | 125-4-S water sprayer | 1.250″-7 | 1-5/8″ & up | 01864 | |
| 6″ | 120-6 | 5/8″-11 | up to 1-1/2″ | 01866 | |
| 6″ | 120-6 | 7/8″ O.D. | up to 1-1/2″ | 55999 | |
| 6″ | 125-6 | 1.250″-7 | 1-5/8″ & up | 01869 | |
| 12″ | 120-12 | 5/8″-11 | up to 1-1/2″ | 01870 | |
| 12″ | 120-12 | 7/8″ O.D. | up to 1-1/2″ | 55696 | |
| 12″ | 125-12 | 1.250″-7 | 1-5/8″ & up | 01873 | |
| 24″ | 125-4 | 1.250″-7 | 1-5/8″ & up | 01909 | |
| 36″ | 125-36 | 1.250″-7 | 1-5/8″ & up | 01877 | |
| 48″ | 125-48 | 1.250″-7 | 1-5/8″ & up | 01897 | |
| 6″ | 187-6 | 1.875″-7 | Optional large bits | 01962 | |
| 12″ | 187-12 | 1.875″-7 | Optional large bits | 01945 |
