The product in display is Micro Tap and Die set Jewelers Tool set for cutting very small internal and external threads. 7 tap with matching draw-plate die from 1.0mm to 1.7mm in 0.1mm increments; 48 - 56 TPI. Internal-thread cutting taps, 1/16 inch shank; use with pin vise or other hand tool. Draw-plate lets you thread wire or make your own tiny screws; 1.0 - 1.7mm. Hardened and tempered carbon steel; cuts gold, silver, brass, copper, soft steel and maintains edge.PLEASE CLEAN AND APPLY OIL BEFORE USE.Scorpion is committed to providing the customer with the best source for value possible on the market. You will enjoy the quality, function and usefulness of our products