Schmidt hammers, or concrete test hammers, are used to determine in-place strength of concrete. All of the concrete rebound hammers we carry below accurately measure compressive strength of concrete, which directly determines the load-bearing capacity and durability of concrete structures. All models also include a grinding stone, carrying case and instruction booklet with conversion charts so you can quickly make determinations about the strength of concrete structures, like bridges, parking decks, commercial structures and pre cast concrete structures. Schmidt hammers usually refer to those test hammers manufactured by Proceq, which we carry and are often referred to as the original Schmidt hammer.