Guided Boring Machine (GBM) systems from Akkerman use a jacking frame, a digital guidance system and one of four angled steering heads to match various displaceable geological conditions. The guidance system enables contractors to accomplish longer drive lengths. A range of upsizing tooling makes it possible to install up to 72-inch steel casing. The Rock Drill Adapter for Tri-Hawk drill bits can be used in rock density up to 18,000 psi. The inaugural pilot tube rock bore took place in September 2015 in Australia and to date, subsequent runs up to 225 feet have been achieved in North America. 800/533-0386; www.akkerman.com