CTA Tools 8233   Sae Thread Restoring File Eliminates Damage on Threads of Bolts and Shafts Featuring a Crosscut Design Engineered with a Depth that is Proportional to the Thread Pitch Measuring 7/16-Inches Square by 8-3/8-Inches Long SAE File Pitch Sizes Include: 1, 12, 13, 14, 16, 18, 20, 24 Threads Per-Inch