... operation 4,Reading the test result from the scal Schmidt Hammer AL-150 RAMITTARI INSTRUMENTS REBOUND TESTER AL-150R Product ... Information :Rebound Tester also called Concrete Test Hammer,Elasticity Tester.1. Normal impact energy: 2.207J2. Use ... 2/3 forces compared with counterpart products), flexible, inexpensive, power-free, easy to master; the button applies stretching technics and ...