4 1/4″ high x 2 1/2″ wide. Brass body. Steel shackle. 4 brass wheels. “37” & “5 27” is stamped on the obverse of the shackle. “Doug Oestreich” is etched on the reverse of the body. To open the lock turn and count the number of clicks after the blank on each wheel. Only 1 of these locks were made.