Set of Hand Held punches ( Font Size 10 mm ) of high quality heat treated Tool Steel as per description Of IS: 6864/ 1984. Hand held punches ( a ) Alphabets A to Z ( size- 10 mm ) ( b ) Numbers 0 to 9 ( size- 10 mm ) Dimension 16 X 16 X 90 MM Hardness of letter end: 56- 62 HRC Hardness of Striking End: 38- 46 HRC. Total 36 Pieces ( 36 piece X 3 set )