Should I use a handheld or spindle screwdriver?

Handheld screwdrivers require manual positioning, whereas a spindle screwdriver can be automatically positioned using robotic or actuated fixturing. So, the answer comes down to production requirements such as how often the driver is used, how difficult the part is to work with, required torque accuracy and how ergonomic the application is overall. Handheld powered screwdrivers are great for low-volume, bench-top work with nominal torque accuracy requirements, whereas automatic spindle screwdrivers are preferred for production-level manufacturing with tight-tolerance torque and positioning requirements.