A special quality machinist square made by Shinwa. The square has metric graduations & special Kadome graduations which finds the maximum square piece out of round stock. It is made of heavy duty stainless steel construction. The overall height of the blade on the square is 6-1/4", & the base measures 4" long x 3/4" high x 5/16" thick. The graduations are etched in the steel with mm increments. An excellent versatile square & a great tool for a wide variety of projects.