Wittner Zuerich   violin chinrest in height and tilt adjustable, side mount 3/4-4/4, with screwdriver

Wittner Zuerich   violin chinrest in height and tilt adjustable, side mount 1/2, with screwdriver

Wittner Zuerich   violin chinrest in height and tilt adjustable, side mount 3/4-4/4, without screwdriver

Wittner Zuerich   violin chinrest in height and tilt adjustable, side mount 1/2, without screwdriver