"I've held samples like these in my hands, and they are impressive.  I assume that the inside piece is made from a separate piece of steel than the surrounding part, then the faces are ground to be smooth which gives it a uniform appearance. Otherwise I would expect you would need to drill a hole to feed the wire through to get it started on the inside of the hallow part.  I've not seen any drill marks on these.  Can anyone confirm this?"

"I thought your comment on the chuck was way off. So having a keyless chuck is convenient, however about every 3rd time I use a drill it gets stuck, and the bit just spins useless in the keyless chuck. If you had actual chuck you could generate enough force to keep the bit in the chuck.  I'm no hulk, but I can open jars that others have trouble with, so I'm not super weak either.  Also demographically a lot of users are getting older, baby boomers, many are women etc, my father has the same trouble.  Being able to accomplish the job without a bit getting stuck is more convenient than a keyless chuck."

"How do the doors work on this concept?"