Orthodontic expansion screw for laboratory fabrication of removable appliances, featuring stainless steel construction with cone-shaped skeletonized holder. Equipped with straight guide pins with mushroom attachment, cross-perforated body for optimal acrylic retention, and travel limitation mechanism after reaching maximum extension of 6.0mm. Includes expansion screwdriver and yellow plastic direction arrow indicator, with activation of 0.40mm per quarter turn (4 quarter turns total). Package contains 100 pieces.
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