Earth auger is a kind ofsuitable for building fast into the hole in foundation engineering constructionmachinery, applicable to electric power, telecommunications, municipal,high-speed, high-speed, highway, construction, petroleum, timber and other columnbar above the layer of soil pile and pier, drilling engineering of forest tree,multi-functional characteristics. Its construction of high efficiency, is theelectric power, communication, municipal, railway, highway, construction,petroleum, trees, such as the ideal foundation construction equipment. Spiraldrill is suitable for the filling soil, clay, powder soil and silt layer, sandlayer and the drilling short screw can't contain part of the pebble and gravelstratum. Using core drill bit, can also be embedded in rock.