Used to measure gap width and clearance between two parts. Made of finest tempered steel and carefully finished to size. Ends are rounded, no ragged edges. Convenient 3/16" hole punched in the end for hanging up. Marked with thickness and furnished in individual envelopes. 32-piece assortment includes 1 each of thicknesses .001", 0015", .002", .0025", .003", .004", .005", .006", .007", .008", .009", .010", .011", .012", .013", .014", .015", .016", .017", .018", .019", .020", .021", .022", .023", .024", .025", .026", .027", .028", .029", .030".