The auger drill bit for planting uses Solid Shaft and one-piece design.The hex shank handle is directly connected to the drill bit, not welded, making our tool more robust.The auger drill bit set upgraded with Triangle Head for greater digging power,perfect for quickly digging holes in sand/wet/dry soil.The auger drill bits have three sizes,422、730and537.A set of garden auger spiral drill bits can meet your daily needs.The size is suitable for various applications.A good choice for auger drill bit for planting can improve working efficiency greatly when planting bulbs, potted plants, vegetables, flowers, bare root trees and shrubs, tilling soil or planter boxes, mixing seed, soil, fertilizer, paint, or batches of mortar mix.Our auger drill bit point on it hits the ground first and keeps it steady when you are digging hard grounds. Spade head design sharper faster than cone head design.