Choose square disc cutter set which comes with 7 hardened steel punches with 4mm to 16mm size. High quality square steel block is used to place precisely for accurate working. Always use rubber or mate underneath the disc cutter set to protect your bench surface. All punches are machined flat and smooth at the cutting end ensuring perfect square blanks every time. Use beveled face on the top to strike with 1LB BRASS HAMMER / 2LB BRASS HAMMER.