48. Always be sure you have a firm footing.Be sure no one is below when using the tool inhigh locations.9. Hold the tool firmly with both hands.10. Keep hands away from moving parts.11. Do not leave the tool running. Operate the toolonly when hand-held.12. Do not point the tool at any one in the areawhen operating. The bit could fly out andinjure someone seriously.13. Do not touch the bit or parts close to the bitimmediately after operation; they may beextremely hot and could burn your skin.14. Some material contains chemicals which maybe toxic. Take caution to prevent dustinhalation and skin contact. Follow materialsupplier safety data.SAVE THESE INSTRUCTIONS.WARNING:MISUSE or failure to follow the safety rules stated inthis instruction manual may cause serious personalinjury.FUNCTIONAL DESCRIPTIONCAUTION:• Always be sure that the tool is switched off andunplugged before adjusting or checking function onthe tool.Switch action1006307FOR MODEL HR4511CCAUTION:• Before plugging in the tool, always check to seethat the switch trigger actuates properly andreturns to the "OFF" position when released.To start the tool, simply pull the switch trigger. Releasethe switch trigger to stop.FOR MODELS HR4510C/ HR4501CTrigger switchCAUTION:• Before plugging in the tool, always check to seethat the switch trigger actuates properly andreturns to the "OFF" position when released.• This switch functions when setting the tool insymbol and symbol modes.To start the tool, simply pull the switch trigger. Releasethe switch trigger to stop.Slide switchCAUTION:• Before plugging in the tool, always check to seethat the tool is switched off.• This switch functions only when setting the tool insymbol action mode.When using the tool in the hammering mode for a longtime, the slide switch is available. To start the tool, pushthe "I (ON)" side of the switch lever. To stop the tool,push the "O (OFF)" side of the switch lever.1006308Speed change1006334The revolutions and blows per minute can be adjustedjust by turning the adjusting dial. The dial is marked 1(lowest speed) to 5 (full speed).Refer to the table below for the relationship between thenumber settings on the adjusting dial and therevolutions/blows per minute.1. Adjusting dial1. Switch lever1. Switch trigger