A self tightening grip using a scissor action. Initial grip is provided by spring tension. This grip is particularly useful where rapid sample changes are required or the capstan action of the wedge grips is too slow. A locking screw is provided to hold one of the grips open while positioning the sample in the other. Jaw faces for flat and round samples are available but these cannot be changed by the user. Flat jaw faces have a 1mm pyramid tooth form, round sample jaws have a buttressed tooth. Special jaw faces on request.

All parts are either stainless steel or plated for corrosion resistance.