The Professional Series Regular Augers from AMS boast a reliable 3/4" threaded connection, reinforced by extra gussets at the top and bottom of the bail for extra strength and rigidity. Enhanced with thicker cutting teeth and superior welds, these augers will stand up against hard or rocky soils and can reach even the deepest of depths. Plus, the 3/4" threaded connections can be added to most AMS augers and core samplers for an additional $25. Visit our website to explore our new Professional Soil Sampling Kits, and contact us for more details.