1.2 Size The earth auger set contains 2 different sizes of twist drills: 8 x 30 cm (3 "x 12"), 4 x 22 cm (1.6 "x 9"). This large earth auger, suitable for digging large and deep holes; this small auger, suitable for small and shallow holes.^2.High quality material Made of high quality manganese steel & steel, this makes it durable and not easily deformable. The surface has a black coating and is not easy to rust.^3.High Efficiency Spiral design for easy digging of soil. Use the earth auger in a suitable landscape at low speed (18V or more bit recommended.) A hole can be drilled in a few seconds. Note Not suitable for large or hard stones.^4.WIDE APPLICATION The Garden Auger Set is a professional choice for landscapers, it simplifies drilling tasks, great DIY tools for planting potted plants, flowers, vegetables, bare-root trees and shrubs, mixing seeds, fertilizer, soil, paint or Mortar mixes, taking soil samples, drilling plant holes or erecting fences.^5.Note: 1.Due to the difference between different monitors, the picture may not reflect the actual color of the item. 2. Due to manual measurement, there may be 1-2mm error.