Toro Dingo High Torque Auger Power Head AttachmentIn any drive head, there is a tradeoff between torque (power) and speed (revolutions per minute). The high torque head provides a large amount of torque to the auger at a slower speed. The high torque translates into the Dingo's capability to dig 30" (76. 2 cm) holes up to 6' (1. 8 m) deep in clay, gravel, sandstone and many other conditions where lower torque heads get stuck. Features: Designed for large auger bits up to 30" (76cm) High Torque