Suitable for soft to hard silt and clay, loose to dense sand and gravel (0 - 1.5 Mpa). With Betek Tungstuds (uncased) or wear strips (cased) as wear protection along body and bottoms. Fitted with Betek teeth and interchangeable bit. Rotating bottom in Hardox HB 500. 

Double cut is recommended in uncases bores or for bigger diameters and for secant pile walls.

The bottom gate can be opened manually or mechanically via a spring loaded pin.

A ventilation pipe prevents the development of a vacuum during extraction