Fan-type expansion screw for fabrication of orthodontic appliances designed for anterior or posterior expansion in the maxilla. Made from stainless steel with wide holder, featuring fan-shaped opening mechanism with maximum expansion of 7.0mm (4 x 1/4 turns = 0.80mm per activation). Includes expansion screwdriver (straight, small-standard) with printed direction arrow in blue-yellow. Package contains 10 pieces.
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