Features:1. It is made of high-speed steel with titanium plating, which greatly improves the cutting performance of the drill bit, is more wear-resistant and prolongs the service life.2. It ensures sharp, fast execution while maintaining strength and efficiency.3. All cutting teeth are precision cnc machined and precisely heat treated for optimum thread performance.4. The entry-level version is made of high- steel titanium-plated, suitable for tapping aluminum alloy center shaft threads the professional version is made of high- steel titanium-plated cobalt, suitable for tapping aluminum, iron, and stainless steel bottom bracket threads.5. Fine workmanship, school to prevent debris accumulation, more wear-resistant, longer service life.Notice:xActual color may be slightly different from the image due to different Display and light effectxPlease allow 1-3cm deviation due to manual measurementDescription:Size: 35x25x18MM Package List:1 pair x Bike Bottom Bracket Thread Tapping Tool 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.