Automatic hammer
This 140-pound (63.5 kg) automatic hammer gives you extremely consistent and accurate Standard Penetration Test results, meeting all ASTM-D-1586-84 requirements. There are no ropes or cables to impede the free-fall of the weight. A viewing slot allows you to verify the 30 inch (76.2 cm) fall height. To improve safety, all moving parts are enclosed, including the impact area between weight and anvil