... grouting anchor.Installation methodFirst :two fastening nut threaded rod screwed and fastened to each ... bottom of the rock hole, then bolt nut with Roofbolter connection, stir, so that ... then Shanghao tray, screwed into a fastening nut, and reach a certain torque: M16 to 110N ... toolsWrench Roofbolter Torque wrenchStorage, routine maintenanceStorage with a clean, dry, ventilated, not rain, 10cm ...