If you look at my best precision screwdrivers review, every single design features a free-spinning end cap. The question of why comes up regularly, and I tried to answer it in the comments section of my recent Milwaukee precision screwdrivers preview post.
Take a look at the above image, which shows a Milwuakee precision screwdriver being held in place with a model’s pointer finger while the thumb and middle finger twirl the handle.
That’s one way precision screwdrivers can be used, although it’s now not how I use them.
Most of the time, I press my palm into the cap so that my thumb and pointer finger can reach the meaty part of the screwdriver handle. I then twirl the driver gently and with a controlled motion.
Precision screwdrivers usually work best when there is a small amount of pressure keeping the driver tips engaged with fastener heads. My palm provides this slight pressure. Because the cap is able to freely spin a full 360°, there is little loss of energy of control due to friction. Additionally, this keeps the screwdriver in place and accurately positioned.
With my palm handling the job of applying gentle pressure to the handle, my finger tips are free to turn the handle with control and finesse.
There might be other ways precision drivers’ spinning caps can be used. The example shown above is probably best for reaching down into project enclosures, or for applications where the usage I described might be a little awkward or hard on your wrists.
Do you grip precision screwdrivers in a different way that takes advantage of their spinning caps?