atop Rotor locking system
A locking system developed by atop that is easy to operate, even with one-handed adjustment. The width can be infinitely adjusted by turning the knob on the side.
Left Side
● Turning the knob anti-clockwise is fixed
● Turning the knob clockwise is loose
Right Side
● Turning the knob clockwise is fixed
● Turning the knob anti-clockwise is loose
Source: https://atop-team.com/