The DX 9 fully automatic powder-actuated nailer is used for fixing profile sheet metal to steel beams. It includes a maintenance indicator which minimises downtime and particularly shows its advantages with regard to ergonomics and productivity. The device allows for an upright working position, reducing back strain and stress on wrists, elbows and shoulders by employing a grip which absorbs recoils. Moreover, the unit’s direct mounting method is characterised by a high working speed.