Wide range of Concrete Test Hammers, which is an instrument easy to use, for quick and approximate measurement of the resistance to pressure of manufactured concrete products. It works on the principle that the rebound of an elastic mass impacting on a surface is a function of the hardness of the surface itself. Hence the harder the surface, the greater is the rebound distance. The Method is based on the principal that the rebound of an elastic mass depends on the hardness of the surface which it strikes. The Test is fast & unlikely to cause damage to the concrete. The hammer is intended for testing the quality of concrete in finished structures such as buildings and bridges. Supplied complete with carrying case and carborundum stone, the hammer is suitable for testing concrete with Compressive Strengths of 10 to 70 N/mm2. Weight 1.4 Kgs. App.