Created for use with alginate or any other type of impression material where detailed reproduction and dimensionally stable results are vital. They lock impression material in the tray to prevent distortion when removing it from the mouth. Uniform thickness gives superior rigidity for consistent results. Bosworth® Stainless Steel Impression Trays have a smooth finish to minimize tissue trauma, and are thin enough to allow for optimum patient comfort. They are autoclavable for extended use and wear.