The standard EN 792 applies to hand-held non-electric power tools driven by rotary or linear motors, powered by compressed air, hydraulic fluid and intended to be used by one operator and supported by: -- the operator's hand or hands -- a harness -- a suspension, e. g. a balancer. This part, EN 792-1, applies to hand-held non-electric power tools for the installation, tightening or removal of both break stem and non-break stem rivets, bolts, plugs and fasteners from one side of a workpiece into metals, plastics and other materials. This part lists the significant hazards caused by such power tools and specifies safety requirements valid for different aspects of safety during their foreseeable lifetime. Power tools covered by this part of the standard: -- breakstem fastener, rivet or plug tools, -- breakstem lockbolt tools, -- mandrel loaded riveting tools, r-- ivet nut setter. Special requirements and modifications on a hand-held power tool for the purpose of mounting it in a fixture are not covered by this part. NOTE At the date of publication no power tools driven by internal combustion engines are known.