Precision cut for woodworking, resin, copper, aluminum, and thin steel sheets; For carving precious metals such as gold and silver; Professional set frame length for engineers and craftsman can be adjusted; Blade for woodworking and resin; Blade thickness 0.009 inch (0.24 mm) φ0.85 spiral type; Front and back to left all directions; For precious metals; Blade thickness 0.0.0.0.0.085 mm 61 mm (61 mm) brass, thin brass For iron plates: Blade Thickness: 0.01 inch (0.28 mm), 50 threads for copper, aluminum, and shells: Blade thickness: 0.01 inch (0.25 mm), 46 threads for hardwood, resin, and iron plates: 0.01 inch (0.24 mm), 33 blades (each blade number is 1.0 inch (25 mm).