Inside Spring Caliper 75mm (3in) - Faithfull ID/6, The Faithfull Internal Spring Calipers, have polished, natural steel finish legs, are made of flat stock and are carefully balanced, with treated points.
A strong but flexible bow spring and centrally located adjustment screw give a smooth and precise action.
Size 150mm (6 in) Faithfull ID/6 Inside Spring Caliper 150mm (6in)