Heavy Duty AUGER for conglomerate soil, small size boulders
(up to Ø 40mm), cobbles with sand and fines, cobbles with fine
grained and organic soils like silty sands, sand-silt mixtures,
clayey sand, sand-clay mixtures, organic and inorganic silts;
cobbles with high/medium/low plasticity clays; cobbles with fat
clays; cobbles with peat; cobbles with muck.
USCS soils: SM,SC, ML, CL, OL, MH, CH, OH, Pt .