TinnerFlow™1st YearHand Tools & SafetyYELLOW · Check First
Wear tight-fitting, foam-lined safety glasses or a full-face shield. * The Cup Trick: Punch the drill bit through the bottom of a disposable plastic or paper cup before inserting it into the chuck. The cup acts as an overhead catch basin for the hot metal spirals falling down.
Wear tight-fitting, foam-lined safety glasses or a full-face shield. * The Cup Trick: Punch the drill bit through the bottom of a disposable plastic or paper cup before inserting it into the chuck. The cup acts as an overhead catch basin for the hot metal spirals falling down.
Use this as training guidance. The foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements always control the final answer.