Economical Filing Tool for Metal Bands Bracelet filing block is a specialized block used when adjusting solid T-Ends of metal watch bracelets. This block has 6 different lengths of 2 different diameters of slots. Choose the right diameter slot with the proper length and file with a flat file. This allows you to file the T-ends precisely to ensure a proper fit. This bracelet filing block is held in a bench vise when filing.