John Doe wrote:
Right angle drives, for drilling?Specifically, the inexpensive
Vermont American 17172. Will it support an 18 V cordless drill?
Milwaukee makes a heavy duty version, part number 48-06-2871, and a
lighter duty version 49-22-8510. Any other right angle drives/gearing
that will support the power of a Bosch/DeWalt 18V cordless drill?

Define "support"? If your drill motor has a chuck, it will be supported.

Is it sturdy and beefy and something you would expect to last a few years on
a jobsite? Mine doesn't feel that solid, but for what it is it works great.

Jon