The ESP PLUS pulls a 3 (or 4) foot long by 1.2 inch diameter sample in one plunge. It captures every sample in a plastic liner and can sample to 3 (or 4) feet. Sampling tube is driven by a 12.5 pound drop-hammer (or electric hammer) and retrieved with a foot-operated jack.
In spite of its name, the Clay Auger will sample the widest variety of soils. Good for most soils between dry sand and wet mud. Fits all threaded connection JMC Professional Auger components.
Already have a Bosch 11316 Percussion Hammer, 11245 Rotary Hammer, or Bosch RH1255VC Rotary Hammer? Then all you need is this adapter for your JMC Environmentalist's Sub-Soil Probe.