I had a dental implant a couple of years ago. The dentist was a really nice guy, I asked him what thread the post was that screwed onto the abutment (the bit that's attached to your jawbone) and he said, 'My Dad's an engineer, that was his first question!'.
He showed me the miniature torque wrench he used to put the post on the abutment correctly, it was the most beautiful piece of workmanship, it, along with it's attachments, sat comfortably on the dentist's palm. I wasn't allowed to touch it as it was sterile (and I suspect he was a bit protective about it!),I forget the torque setting he used for this job but it wasn't enough to cause a pang to a gnat who had it's left nadger caught in it!
On the other end of the 'loved tools' scale, I know a guy who has a flooring company, he buys cheap rechargeable power tools for his men and, incredibly, they leave them on the job when they are finished! He says this is the best and most economical way of doing it, I don't see that myself though, it just sounds wasteful.
Regards,
John.