Engineers worldwide use Original SCHMIDT Concrete Test Hammer to assess concrete quality and strength characterstics. Proceq manufactures the industry's widest range of hammer types to fit virtually every in situ test application -including the Original SCHMIDT Hammers type N and L, recording type NR and LR, digital types ND and LD DIGI-SCHMIDT, as well as the specialty type SCHMIDT Pendulum hammers P,PT,PM. This instrument enables engineers to measure the strength of existing concrete structures in situ to control concrete quality and to detect weak spots.