3″ high x 1 1/4″ case diameter. Brass body. Brass and steel dial. This lock was made specifically for locking a steering column. “PAT.FEB.18-08 OTHER PAT. PEND.” is stamped on the top of the body. “ROCHESTER SAFETY LOCK CO ROCHESTER INDIANA” is stamped on the obverse of the shackle.Patent #931684 US Patent #879747 US Patent #904182