The Fastfix depth stop chuck looks to be one of those accessories that will pay for itself in increased productivity.
My question is are the bit inserts interchangeable for use with other types of screw heads i.e. Robertson, Torx, etc.?
Yes they are removable & interchangeable. They are the standard 1" bit tips. I use it for quick drywall repairs and have used it for other depth necessary situations as well! It's a nice accessory to have on hand.
The polished metal tip twists off, exposing the bit holder. I just used mine for the first time with Torx screws and it worked great! Setting depth is super easy too.