Our garden drill bit made of heavy duty steel, with glossy black painted finish. Upgraded to solid shaft with triangle bit,greater groundbreaking ability than the old version.The auger drill bit point keeps the auger steady when you are digging hard grounds, so auger drill bit will start working on hard ground without having to push down. 2 pack auger drill bits in package, one is 70mm diameter by 30cm,the other is 4cm diameter by 22cm, extended length fence post hole digger will help you make 70mm diameter and 4cm diameter holes even standing up, you don?t need to bend over to dig holes anymore in the planting season. With the power of cordless drill, hundreds of holes will be finished in minutes. Say goodbye to heavy manual work and back strain ever. The garden auger will work with any 8mm or 10mm or larger chucked drill, 18V or greater drill recommended. We suggest using drill with adjustable drill chuck, so it will fit any sizes augers, you will never worry about if our drill fit the augers any more; Keep auger clean from soil and debris when not in use for extend service time. Spiral hole digger is very practical tool for increasing efficiency when planting bulbs, potted plants, vegetables, flowers, bare root trees and shrubs, tilling soil or planter boxes, mixing seed, soil, fertilizer, paint; Our earth drill bit is also effortlessly dig post holes and drill a hole in sand to anchor your beach umbrella. Also great use as compost turner. Ideal gifts for the one you loved in the planting season. The garden digging tools is really helpful and practical tool for those who loves gardening work, or needs to do planting in the planting season. We have many sizes and styles for you to choose according to your planting needs.