Consists of a study handle under. Which is fixed a sensitive proving ring. An extension piece is fixed to the bottom of the proving ring and carries a detachable penetration cone at its tip. Proving ring capacity 100 kg (1kn) and 0.002mm dial gauge provided indicates the penetration load applied. An optical viewer is provided to facilitate reading the dial gauge by the operator. Simplified for single person operation. A calibration chart is provided for the proving ring. Instrument is complete in a wooden carrying case.