Specifically designed to auger a tight fitting hole when installing 50 mm outside diameter aluminium access tubing used with the Neutron Probe. Set includes a spiral auger for clay soils, a shell auger for sandy or dry clay soils, extension and T-handle.
Can also be used for auger holes for MP406 Soil Moisture Probes.
Holes can be augered for 2m aluminium tubes. These sets are suitable for augering holes for 1.5m aluminum tubes. An additional extension is needed to auger holes for 2m aluminium tubes. For sandy soils we recommend the 50mm auger set. For clay soils (expansive) we recommend the 48mm auger set to ensure a tight fit for the aluminium tubes.