Irwin Industrial Tools 4935059 Metric Alignment Dies 3mm to 12mm with Coarse and Fine Thread Pitches,IRWIN,4935059" /> Contains 17 dies from 3mm to 12mm with National Corse and National Fine Thread pitches Dies features 1/8-Inch of additional steel in the form of a guide to align the die for threading, this also creates additional strength for the die High carbon Steel Construction Laser Etched Markings for easy identification