Uxcell 5-40 Round Dies Machine Thread Threading Dies 0.8" Od 2Pcs, Machine Tap Specification: Dies Machine Thread Threading Machine Tap Package Content: Feature: Straight 3 flutes are ground to provide rapid chip removal for efficient threading. Features: Dies Machine Thread Threading(Thread Size: 5-40, Outside Diameter: 20mm / 0.8", Thickness: 5mm / 0.2"); Machine Tap(Thread Size: 5-40 UNC, Shank Side Width: 2.7mm / 0.11 inch, Thread Length: 17mm / 0.67 inch, Total Length: 52mm / 2 inch) Straight 3 flutes are ground to provide rapid chip removal for efficient threading. Used with some cutting fluid or keep it wet when tapping, the tap will last longer. Suitable for drilling, tapping, cutting on soft metal, aluminum plate, iron. Solid round dies are suitable for general purpose threading. Great for maintenance and repair work. Great for maintenance and repair work in the shop or field. Die size is etched on the surface for easy identification. Round Dies are perfect for re-threading existing threads in hard materials like metal or making new threads in softer material such as plastic.