Easy To Use: The digging auger is suitable for most cordless electric drills. When drilling holes in suitable soil or landscape, the auger will start working on the hard ground and easily dig a hole in just a few seconds. Note: Not suitable for large rocks or solid rocks. Save Time: When planting bulbs in any type of soil, you just need to drill as many holes as possible, then to remove the auger from the hole, saving you time and labor. Application: Can be used to plant a variety of potted plants, flowers and vegetables. Suitable for planting tulips, irises, bulbs, bedding plants and seedlings. These spiral drill bits are the professional landscaper's ideal choice, well suited for planting bare root trees and shrubs, cultivating soil, and mixing seeds. Other Uses: It also has many other uses , such as mixing fertilizer into bedding, planting and seeding, mixing polymer into soil and more. Sturdy And Durable: The heavy-duty solid steel shaft won't twist won't bend or deform, durable to use.