I've always been leery of the type that uses a set screw to bite down on the armor. I saw three different types today at Lowes.

One was a type that uses metal straps held in place with two screws at opposite ends. Another type is a sort of compression fitting. A third has a saddle (a piece of metal inside the connector body) that clamps down on the armor.

Each of these seem like they avoid damaging the armor. I've always been leery of having the set screw pierce or crush the armor, yet I want to have a good reliable ground connection. [Linked Image]