For soils with a large gravel content. The auger body for stony soils consists of a heavy steel strip, vaulted all along, which is bent double by forging. The pointed cutting bits of the strip are bent outward, thus creating a hole somewhat wider than the average body diameter.
Technical data:
.Stony soil auger, Ø 7 cm: 1.9 kg, 122 × 7 × 7 cm