1.Garden augers are available in 4 sizes: 1.6 x 8.7 inches, 1.8 x 14 inches, and 3.1 x 12 inches. 3 sizes of auger drill bits for planting,With 3/8 inch non-slip drives, these auger drill bits are ideal tools for digging holes in your yard. 2.Made of upgraded heavy-duty alloy steel, it is durable and has a shiny black paint surface, which is not easy to rust. It is of great help to those who need it for field and flower work. When not in use, keep the auger clean of soil and debris. 3.Easy to use: suitable for any electric or cordless drill bit with a 3/8-inch drill bit, just tighten the drill chuck to fix the auger, you can dig, saving time and energy. It is recommended to use an 18v or larger electric drill; for cordless electric drills, it is recommended to use a minimum of 14v electric drill. 4.The auger drill bits used for planting are an excellent choice for increasing planting efficiency when planting bulbs, potted plants, vegetables, flowers, bare-rooted trees and shrubs, cultivating soil or planter boxes, mixing seeds, soil, fertilizer, and paint.