24 tractor beams

“Not really," Nova said. "The station is designed to withstand massive attack from without, but nobody “worries too much about security within. The place is full of stormtroopers, guards, army and navy personnel, even a few bounty hunters thrown in. Plus, the only ways in or out are well protected. And if you do manage to get out, there are enough guns to turn you into subatomic particles, and twenty-four tractor beam batteries to hold you still while they do it.”

***

Star Wars: Death Star Part 2 Chapter 66