Post-hole digger One-level gear speed transmission system Quicker auger speed than two-level gear speed transmission system Post-hole diggerEngine ... Displacement: 51.7CCAuger speed: 170-200rpm Optional Auger diameter:Φ60mm,Φ80mm,Φ100mm,Φ150mm,Φ200mm,Φ250mm,Φ300mmPacking ... auger factory,we suggest clients to use 150mm dia auger bit or less than 150mm,so can keep high working life Post-hole digger ...