Electric Post Hole Digger This 1500W auger drill spins at 140 Rpm, easily digging through hard or soft soil. It drills up to 5.91 in (150 mm) diameter and 36.42 in (925 mm) deep. The durable, rust-resistant bit has a security lock, a non-slip handle, and an adjustable extension rod for easy, secure use. This electric drill features a security lock, reverse function, and quick start for a better operating experience.