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4. Wear a mask when turning your head upward. 5. Properly set the bit holder. 6. At the start of work, confirm screw tihghtening. 7. When working at a highly elevated location, pay attention to articles and persons below. 8. Wear portective shoes to protect your feet. 9. Make positively certain that you wear gloves when engaged in work for a long time since the grip can become very hot. 10. There is also a risk for a tool to be damaged, and therefore exercise utmost caution for any possible fall