Tiemann's 12 blade brass scarificator with wooden handle housed in a velvet lined wood box, original paper label on the interior. Manufactured by George Tiemann of New York, patented August 20, 1846. The screw at the top of the head allows for the depth of the cut to be altered and when the screw and trigger are pulled the blades are released. 2" x 7.5" x 2.5"