Product name: Earth auger or ground drill, garden auger, ice auger, earth drill, post hole drill and so on. Material: Steel Fast drilling at soft coal or rock water through or not coal mining used east dust out Diameter 42,69,70,83,89,98mm 1. Function: drilling holes of exploring gas and water, injection water and discharging stratum pressure2. Features: i. easy to assemble and disassemble ii. ...