11pcs Magnetic Head Torx Screwdriver Bit Set T6-T40 Security Tamper Proof Star

Can’t complain about value or quality, the fit was fine and they didn’t fall apart or break or strip, so the material used was fine. Casual user approved.

Using for servicing electronics that don't allow a normal bit driver to fit. They seem to do the job. I'm sure I'll wear them out pretty fast but they are affordable.

I have several sets of 'security' Torx bits which crumbled when put to the test. These cost more, but have been very reliable in their first job. They fit well into my drill/driver chuck, and are mildly magnetic for convenient holding of screws.

Sizes are engraved (or otherwise recessed) into the base, with the numbers incised deeply enough that I could put a bit of white paint into them, and scrape off the excess, making them easy to read. This is important to me, as my eyesight is kind of crappy.