ZC3-A Silver Rebound Hammer for Mortar Sclerometer Zc3 Concrete Test Hammer
Buffer spring. the button applies stretching technics and is not easy to fall off; the pointer is easy to adjust friction. Work length of flip tensioned spring: 61.5.0±0.3(mm). Rigidity of flip tensioned spring: 785.0±40.0(N/m).