4 1/2″ high x 2 3/4″ wide x 3/4″ deep. Steel body. Steel shackle. Brass buttons. “55” is stamped on obverse of the shackle. “0212” is stamped on the reverse of the body.”Doug Oestreich” is etched on the reverse of the body. Lock operation: Press the the correct 5 buttons and slide one side of the lock body downward. This lock is based on the “Yale Slider”. February 2012. Only 1 of these locks were made.