Craftsman metric tap and die set. For cutting and renewing internal and external threads hardened, precision-ground and polished carbon steel make chip removal easy. Usage: Cutting and Renewing Internal Threads6 metric dies: 6mm x 1.0, 7mm x 1.0, 8mm x 1.25, 9mm x 1.25, 10mm x 1.25Diameter: 3mm, x .60, 4mm x .70, 4mm x .75, 5mm x .80, 6mm x 1.0, 7mm x 1.0, 8mm x 1.25, 9mm x 1.25, 10mm x 1.25, 10mm x 1.50