【Spiral Design for Digging Soil Without Difficulty】 Use a low-speed (slow) drill, drill into the soil or suitable landscape, the auger bit will start working on hard soil, easily dig a hole in seconds and work well even in rammed soil. Note: Not suitable for large or solid rocks. 【High Quality Material】Made of sturdy steel, durable to use. With the glossy black painted finish, the cultivator drill bit is not easy to rust. 【Universal Accessories】 Works well with any cordless or corded drill with a 10mm (3/8") or larger chuck (which is very common). 【Widely Application】 This auger is the professional landscaper's choice, simplifying drilling tasks. Great DIY tools for planting bulbs, potted plants, vegetables, flowers, bare root trees and shrubs, cultivating soil or planters, mixing seeds, soil, fertilizer, paint or mortar mixes for hardscapes. posts, termite bait stations, soil sampling, drilling of holes.