Feature●steel●Made in US●Use for bending and forming metal●This longer sheet metal folding tool assures a more uniform fold●Includes handy sight holes to assure proper depth alignment●The 18F model is 18-inch (46 cm) long●The 18F model has 3/8-inch (9.5 mm) and 1-inch (25.4 mm) depthsDescription The 18F Folding tool seams are formed from two steel halves that are permanently joined together. Handy slight holes assure proper depth alignment. This tool can be used to make hems, pans and drive edges.