The Blue Jenny Module stacker holds up to three Blue Jenny wire spinners internally and one on top (total of four spinners) to enable multiple wires to be run at the same time. If you need to run more than three wires you can sit an extra spinner on top, or run two stackers side by side for a total of 8 wires run out at once. Perfect for Weston Fencing!
The magazine style loading means you can load one spinner at a time regardless of how much wire remains in the other spinners.
Note that the photo shows the stacker loaded with Blue Jennies. Module price does not include wire spinners.