Measure the compressive strength of concrete. These testers are often used in the construction industry to assess the quality and integrity of poured concrete. An OLED display gives clear readings, even from wide viewing angles. The rebound body, which is separable from the display, can be used up to 2,000 times before you need to replace it. It's also known as a rebound hammer. For accurate results, create a smooth surface on your concrete with the sanding stone before testing. Export test reports and strength curves with the included software.