The 42pcs rethread tools kit includes 1 metric file, 1 rethread file and hex rethreading tools of color coded. The kit is used to repair damaged threads of autos.Specifications:Material: Carbon steelPackage Weight: 1500g / 52.91ouncesPackage Size: 480 * 320 * 50mm / 18.9 * 12.6 * 1.97in42Pcs Sizes:21Pcs rethreader dies size: 1/4 34;, 5/16 34;, 3/8 34;, 7/16 34;, 1/2 34;, 9/16 34;, 5/8 34; UNF 1/4, 5/16, 3/8, 7/16, 1/2. 9/16, 5/8 UNC 6x1.00, 8x1.25, 10x1.25, 10x1.50, 12x1.25, 12x1.5, 12x1.75mm19Pcs rethreader taps sizes: 1/4 34;, 5/16 34;, 3/8 34;, 7/16 34;, 1/2 34;, 9/16 34; UNF 1/4 34;, 5/16 34;, 3/8 34;,7/16 34;, 1/2 34;, 9/16 34; UNC 6x1.00, 8x1.25, 10x1.25, 10x1.50, 12x1.25, 12x1.5, 12x1.75mm pitch sizes:SAE file: 11, 12, 13, 14, 16, 18, 20 24SAE file: 9, 10, 12, 16, 20, 27, 28 32Packing List:1 * Metric File1 * Rethread File21 * Rethreader Dies19 * Rethreader Taps1 * Lastics Box