To pre-tension the cables, the author fashioned a block from strapping that allowed him to lever a pair of locking pliers at each bracket point.
To reach final tension, the author secures a brass locknut on the threaded stud using a wrench (included by RailFx) and a 1/8-inch hex key to hold each cable in position.
When a cable is fully tensioned, he cuts it with an abrasive wheel on a Dremel tool.
Each cut end is finished off with a decorative metal cap.
This photo shows the completed railing from the yard and highlights the outside corner.