Suitable for machining 3.3~5mm internal holes and intersecting holes, achieving double-sided chamfering in a single pass and simultaneously removing burrs from the hole inlet and outlet. The inserts are made of imported M35 high-speed steel, and the tool holder is made of imported high-speed steel, ensuring high rigidity and cutting efficiency through superior materials. The specially designed angle of the insert tip prevents scratching the inner hole wall during through-hole cutting, ensuring a high-quality workpiece surface. The inserts are easy to replace, reducing consumable costs and making it suitable for long-term batch processing. service: we value our customers' shopping experience. if you have any questions, please feel free to contact us, and we will respond as soon as possible within 24 hours