What should you always do in relation to the drill before withdrawing it from the assembly?

Before withdrawing the drill from the assembly, it is crucial to stop the drill by releasing the trigger. This action prevents unintended movement or damage during the withdrawal process. Ensuring that the tool is not actively rotating minimizes the risk of injury, as well as potential harm to the assembly being worked on. It also helps maintain accuracy and control over the drilling operation, as any residue or debris can be handled more safely without the drill in motion.

The other actions, although important in certain contexts, do not directly address the immediate safety and precision concerns associated with withdrawing the drill. Adjusting the RPM could be useful at different stages of the drilling process, but it is not necessary before withdrawal. Turning off the power source is more applicable in situations where complete disconnection from power is required, which may not be relevant at the moment of withdrawal if the drill can simply be stopped with the trigger. Lastly, repositioning your hands might be necessary depending on the situation but is not a fundamental step related directly to the operation of the drill itself during withdrawal.