Sandvik DB311 is a versatile secondary breaking unit designed to reduce large boulders and improve the ore flow in mass mining operations. The rig is a self-contained diesel-hydraulic carrier with on-board water tank and large air compressor for air-mist flushing. A robust telescopic boom with double rotation actuators and compact feed enables easy positioning within confined spaces at drawpoints, while the high-frequency rock drill enables fast penetration rates.