Tap & Die Set 6 pieces Jeweler's tool set for cutting very small internal and external threads 5 tap with matching draw-plate die from .06- 1.0mm in 0.1mm increments Internal-thread cutting taps, 1/16" shank; use with pin vise or other hand tool Draw-plate lets you thread wire or make your own tiny screws; .06-1.0mm Hardened and tempered carbon steel; cuts gold, silver, brass, copper, soft steel and maintains edge