Tennis stringing machines.
Computer-controlled electronic stringing machines for tennis clubs, coaches, and racquet service shops.

S3169 is the all-round first recommendation.
It supports tennis and badminton, has digital electronic control, and can be configured for squash with additional clamps.
When to consider S6.
Choose S6 when the stringer values adjustable working height and the main workload is tennis and badminton. For squash, confirm racquet frame compatibility before quoting.