Boomer E3 and Boomer E4 are hydraulic face drilling rigs for medium to large drifts and tunnels with cross sections up to 205 m². Even in the toughest rock conditions, breaking ground is easy with the heavy-duty But 45 boom. Boomer E series drill rigs are equipped with our internationally acclaimed Rig Control System (RCS). To optimize uptime, these rigs have self-diagnostic capabilities. Given their long-lasting drill strings, high drilling accuracy and reduced overbreak, the hard working Boomer E3 and Boomer E4 rigs make excellent investments.