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Extension rods are manufactured using high-quality hollow drill steels. These rods are available in two primary shapes: round and hexagonal. The hollow core, commonly referred to as the flushing hole, is essential for transmitting water or air during the drilling process. The integrated threads facilitate secure connections for couplings, shanks, and drill bits.
| HEX 22 - R22 Rope Thread (22mm) | ||||
|---|---|---|---|---|
| Rod Cross Section | Length (L) | Thread | ||
| mm | FT | Left | Right | |
| HEX 22 | 610 | 2' | R22 | R22 |
| HEX 22 | 915 | 3' | R22 | R22 |
| HEX 22 | 1220 | 4' | R22 | R22 |
| HEX 22 | 1525 | 5' | R22 | R22 |
| HEX 22 | 1830 | 6' | R22 | R22 |
| HEX 25 - R25 Rope Thread (25mm) | ||||
|---|---|---|---|---|
| Rod Cross Section | Length (L) | Thread | ||
| mm | FT | Left | Right | |
| HEX 25 | 610 | 2' | R25 | R25 |
| HEX 25 | 1000 | 3' 3" | R25 | R25 |
| HEX 25 | 1525 | 5' | R25 | R25 |
| HEX 25 | 3050 | 10' | R25 | R25 |
| HEX 25 | 4305 | 14' 1-1/2" | R25 | R25 |