8 FT. Sampling tube constructed to produce continuous core sample. Complete with tough point and sturdy end Tube produces a smooth-walled hole, 1-1/4″ (3.2 cm) in diameter, while extracting a soil sample 3/4″ (1.9 cm) in diameter. The optional drop hammer is used to help insert the sampler into the soil, and to remove the sampler and extract a soil sample. An optional Puller Jack, Model 0220, is available to aid in removing the sampler from the soil.