Tuff is sometimes called tufa, particularly
when used as construction material, although tufa also refers to a quite different rock.
This drilling method enables the drilling equipment to excavate a wide variety of soils, dry or water-logged, loose or cohesive, and also to penetrate through low capacity,
soft rock formation like Tuff, loamy clays,
limestone clays, limestone and sandstone etc, The maximum diameter of piling reaches 1.2 m and max.