Diameter of the pad 24.5 mm, boxwood.
Old-style gluing clamp with wooden screw of big pitch
Quick action due to 3.5 mm pitch of the wooden thread. The thread is hidden in the nut, avoiding its exposition to glue and contact with the softer parts of the instrument. The pads are protected with 1 mm natural cork washers.
Jaw opening 27 – 55 mm, Violin