8 3/8 in Thread Restoring Pattern Thread Restoring File Set with Natural Finish; Number of Pieces: 4/ GENERAL CHARACTERISTICS ITEM DESCRIPTION: CONTAINS 4 THREAD RESTORERS; REGULAR BOLT TYPE WITH 11-12, 13-14, 16-18, 20-24 TEETH PER IN.; EXTRA FINE/EXTRA COARSE TYPE WITH 9-10, 12-16, 20-27, 28-32 TEETH PER IN.; REGULAR PIPE TYPE WITH 8-10, 11-1/2-14, 16-18, 24-27 TEETH PER IN.; METRIC BOLT TYPE WITH 0.75-1.00, 1.25-1.50, 1.75-2.00, 2.50-3.00MM