Leofoto PC-190 (190mm) fits tablets which are 115-190mm wide.
Leofoto PC-230 (230mm) fits tablets which are 138-230mm wide.
The width of clamp is adjusted and locked by the lock knob, which is precise and secure. Like the Leofoto phone clamps, the jaws that hold the tablet together are lined with rubber to improve grip and prevent scratches.