The Single-Turn Buckle is intended for use with the kPulley at inertia levels equal to or below 0.070 kgm² (any use of higher inertia levels may be done at your own discretion and risk). This Buckle is predominantly used for a wide variety of shoulder exercises but it can also be useful in situations where lower inertia is preferable, either due to a lower strength level or the need for a faster motion.