Perfect for cutting and renewing external and internal threads to exact standards. 9 Different Sizes: M2 M2.5 M3 M4 M5 M6 M8 M10 M12 Designed to cut threads for standard-sized screws, clear and tidy, no burr, provide rapid chip removal for efficient threading. Spiral Tap the crumbs into a spiral up chip evacuation, it is more suitable for the processing of blind holes and not easily broken tap. Made from high speed steel 6542 with titanium coating for high wear and heat resistant, durable and has long service life. High speed steel 6542 material suitable for drilling tapping cutting on light metal aluminum board, iron plate, ordinary stainless steel and other hard materials. (Not HSS4241 Material) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.