A: Native drive is 2.5" hex. Adapters are available for 1.5" hex, 1" square, and various rock drill chucks.

While the upfront cost is higher than entry-level Chinese imports or refurbished older models, the total cost of ownership (TCO) over five years is significantly lower. You pay for the robust metallurgy, the heat-treated gears, and the industry-best seal kit.

For contractors working in rocky terrain, clay-heavy soil, or frozen ground, the Gm-2020 provides the brute force and finesse required to finish the job on time.

| Feature | Geomaster Gm-2020 | Standard Industry Equivalent | | :--- | :--- | :--- | | | Linear curve; maintains 90% torque at low RPM | Drops to 60% torque at low RPM | | Sealing System | Triple-lipped, ceramic-coated shafts | Dual-lipped, standard steel | | Noise Level | 85 dBA (with muffler) | 98-105 dBA | | Weight-to-Torque Ratio | 0.00225 Nm per gram | 0.0018 Nm per gram |