CTA Tools 8240 Universal 53-Piece Rethreading Set includes thread files 8231 and 8233. This set also includes the following color-coded Taps and Dies: Metric – 6 by 1.00, 8 by 1.25, 8 by 1.50, 10 by 1.00, 10 by 1.25, 10 by 1.50, 11 by 1.50, 12 by 1.25, 12 by 1.50, 12 by 1.75, 14 by 1.50-Millimeters. NC-USS – 1/4-Inch - 20, 5/16-Inch – 18, 3/8-Inch – 16, 7/16-Inch – 14, 1/2-Inch – 13, 9/16-Inch – 12. NF-SAE – 1/4-Inch – 28, 5/16-Inch – 24, 3/8-Inch – 24, 7/16-Inch – 20, 1/2-Inch – 20, 9/16-Inch – 18. Die sizes include: Metric – 6 by 1.25, 7 by 1.00, 8 by 1.00-Millimeter; NC-USS – 5/8-Inch – 11 and NF-SAE – 5/8-Inch – 18. Whether tuning up your ‘68 Corvette or changing the oil on a John Deere tractor, CTA can supply you with the tools needed to do the job. California Prop 65 - Warning, This product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.