HT-3000 is large test hammer with large impact
energy 29.43J,  this type test hammer is specially
used to test the concrete  compressive strength in
big construction, such as water  project, dam,
sea port, railway tunnel, mine, bridge, air  port and
high way.
Specifications:
Impact energy: 29.43J (3kgf.m)
tension spring rigidity: 1.6kg/cm
spherical radius of impact pole (SR): 53+/-1mm
dimension: 680*320*105mm
weight: 8kg