Removing the hand drill is prohibited under power! No electrical basics are never hands! Drill operation safety rules: 1.Personal protection when using power drill 1)When the face-up job, you want to wear a protective mask. On the cast iron drilling to wear protective glasses to protect the eyes. 2)Bit holder should be properly installed 3)When the job is in the drill burning state, it should pay attention to skin burns. 4)Handheld drill drill Φ12mm above should be drilled using a pistol with a side handle drilling. 5)Standing on a ladder or work should be prepared to work at heights falls measures ladder should be ground personnel support.
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