The two-piece design of Geoprobe’s 4.5-inch HD sonic drill rod allows just the coupler to be replaced if threads are damaged. Break-out flats minimize jaw pad wear when breaking joints apart, while a rounded pin joint speeds up stabbing of joints together. A larger cross section on the tool joint strengthens the rod, maximizing thread life. Operators attest the tooling lasts longer, reduces downtime, and enables easier joint breaking — all contributing to money-saving benefits.