With 4,200 kW through the mountain. PREMIUM model of a "Gripper-TBM" tunnel propulsion machine including after-runner, sole-moving and gear motor according to the model of HERRENKnecht AG from Schwanau. With the name-giving grabs, lateral extendable hydraulic cylinders clamp the tunnel drill on the tunnel wall. Hydraulic drive cylinders steer the path guide with swivel movements and convey contact pressure to the drill head. With the rotating cutting wheel, this rock chip breaks out of the rock, which is transported off via clearing house, ducts and a conveyor belt. The rock securing in the tunnel is carried out via various machine equipment, such as for mounting reinforcement mats and rock anchors, mounting of stabilizing steel arches or the taking of test holes for pre-exploration. On the successor of the "Gripper-TBM" are conveyor devices for the removal of the rock, additional drilling equipment for the attachment of rock anchors, devices for the concrete lining of the tunnel tube