Steel body. Steel shackle. Steel panels. 5 3/4″ high x 3 1/2″ wide. x 7/8″ deep excluding panels x 5/8″ shackle depth. Weight: 3 pounds 7 ounces. “47” is stamped on the obverse of the shackle. “0710” is stamped on the reverse of the body. “Doug Oestreich” is etched on the reverse of the body. Instructions to Open the lock. July 2010. Only 1 of these locks were made.