
Modern electronic devices have a dizzying variety of screw head shapes. This set seems to have many common shapes in tiny sizes used for personal electronic devices. It's clear that a lot of attention has been paid to the design and layout of the magnet case - the pressure plates on the case, the line drawings of items that use screws and the engraving of each bit are great features that are easy to use, making the case too a major selling point and not just a shipping container for a trash can. At just 1.25 inches long, each bit protrudes just over half an inch from the driver when installed. The magnetic driver itself holds the bits securely and is 5.5 inches long with the bit installed - about the length of a ballpoint pen. I appreciate the rotating handle at the end of my palm - it minimizes abrasion in my palm when I have to "bend over" to fully tighten over-tightened screws. Torx security screws from battery compartments. I have a good set of torx screwdrivers but they are NOT the center pin security type. The bit required is star shaped with a dead hole and now I know why they call this set "Precision". Despite the star's tiny size and even smaller hole size, the two bits needed were included and fitted perfectly. Later I changed the battery in my Timex Expedition watch. Four tiny Phillips screws came off easily, as expected, and then - I tripped over the ridiculous clips inside the watch that hold the coin cell battery. A YouTuber kindly showed how to open them with the tip of a scalpel, but scalpels aren't my toolbox! After looking through the kit a bit I was able to find the smallest spline head I've ever seen and it worked (see photo). I am very happy with this set and it seems to be a very good deal.

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