Which finger should always operate the drill trigger?

The preferred finger for operating the drill trigger is the index finger. Using the index finger allows for better control and precision when operating the drill. This finger has the most dexterity and strength compared to the others, facilitating safer and more effective drilling operations. It also minimizes the risk of accidents, as controlling the drill with the index finger allows for a more ergonomic grip on the tool, ensuring that the user can maintain stability and comfort while working.

Using the thumb can lead to a less stable grip, especially when applying pressure or making precise adjustments. The middle finger does not provide the same level of dexterity for operating a trigger compared to the index finger, and the ring finger typically lacks the strength and control necessary for safely and effectively managing the drill’s operation.