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A hexagonal drill rod, as the name suggests, features a hexagonal cross-section rather than the conventional circular one found in standard drill rods. This design alteration is not merely aesthetic; it serves a functional purpose that significantly enhances performance. The hexagonal configuration provides greater surface area, which in turn increases the contact area between the rod and the drilling machine. This results in better torque transfer, reducing slippage and enhancing overall drilling stability.

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There are several types of core drill bit extension rods available, including straight extension rods, tapered extension rods, and threaded extension rods. Each type has its own unique design and is used for specific drilling applications. Straight extension rods are used for drilling straight holes, tapered extension rods are used for drilling holes with a conical shape, and threaded extension rods are used for attaching different types of drill bits to the extension rod.

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