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. Features: 1 metric file and 1 rethread file. Rethreading tools are color coded for quick visual identification. Hex shape, made of carbon steel for strong strength and long durability. Suitable for use with a socket or key. Packed in blow mould case, easy to storage and carry. Specifications: Material: Carbon steel Package Weight: 1500g / 52.91ounces Package Size: 480 * 320 * 50mm / 18.9 * 12.6 * 1.97in 42Pcs Sizes: 21Pcs rethreader dies size: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8" 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, 12x1.75mm 19Pcs rethreader taps sizes: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16" UNF 1/4", 5/16", 3/8",7/16", 1/2", 9/16" UNC 6x1.00, 8x1.25, 10x1.25, 10x1.50, 12x1.25, 12x1.5, 12x1.75mm Description pitch sizes: SAE file: 11, 12, 13, 14, 16, 18, 20 & 24 SAE file: 9, 10, 12, 16, 20, 27, 28 & 32 Packing List: 1 * Metric File 1 * Rethread File 21 * Rethreader Dies 19 * Rethreader Taps 1 * Lastics Box