The ShearTrac III system is capable of performing the consolidation and shearing phase of a 305 mm x 305 mm (12 in x 12 in) direct shear test under automatic control for soils and geosynthetics (geomembranes, geotextile, GCL, geogrid, etc.) as well as determining the interface frictional properties of soil and geosynthetics, and internal friction of GCLs.