Eijkelkamp 04.01 Single Gouge Augers cannot be extended and are supplied in various lengths and diameters. Available in three standard sets: A set for sampling more or less soft soil layers (SA) with two gouge augers having different lengths but the same diameter, packed in a strong carrying bag. A greater soil depth for each stroke results in the swifter reaching of greater depths. The samples obtained are virtually undisturbed.