I. Usage Method:

1. Unscrew the outer sleeve of the volumetric drill bit, place the ring knife properly, and screw on the ring knife sleeve (Note: The ring knife sleeve does not need to be screwed too tightly).

2. Rotate the handle clockwise and screw it onto the rod.

3. Hold the connected device by the handle, with the drill bit facing downward perpendicular to the soil. Rotate clockwise while applying pressure until the drill bit is filled with soil (a hammer can also be used to strike the handle). Then lift the device and place it flat on the ground. Unscrew the ring knife cup body (if it cannot be unscrewed, tap the threaded area with a rubber hammer). Remove the ring knife, use a soil-cutting knife to make a flat cut at both ends of the ring knife to remove excess soil, place the sample in a bag and label it. The soil sampling process is now complete.

II. Standard Configuration:

2 ring knives, 2 ring knife pressing blocks, 1 directional cylinder, 1 guide rod, 1 drop hammer, 2 knobs.