Time-proven robust design and common sense control system ensure great reliability. Boomer 281 is optimized for small to medium size tunnels and drifts up to 6 m high * 6 m wide. BUT 28 is a heavy duty hydraulic boom with unique features for efficient and trouble-free operation, with coverage area of 48 m2. It is intended for use in mining and tunneling, and designed for operation within medium-size drifts and underground openings.