Spiral design to dig the ground without difficulty Use a drill to low speed (slow), drill the ground or suitable landscape, the drill bit at auger will begin to working on hard ground, will easily dig a hole in seconds and will perform well, even in rammed ground. Note: Not suitable for large rocks or solid rocks. High Quality MaterialMade in China. made of sturdy steel, durable at all times. utilize. With the glossy black painted finish, the cultivator bit is not easy to damage. rust.Universal Accessories Works well with any cordless or cordless drill. wire with a 10 mm (3/8 ) or larger mandrel (which is very common). Widely ApplicationThis drill rig has; spiral is the professional landscaper's choice, simplifies drilling tasks. Great DIY tools for planting bulbs, potted plants, vegetables, flowers, trees, etc. bare roots and shrubs, for cultivating soil or planters, for mixing seed, soil, fertilizer, paint or mortar mixes for harsh landscapes. poles, termite bait stations, soil sampling, hole drilling.Products include drill bits only