●Professional Design This gear router bit is a special tool specially designed for milling gears. It is very professional and has a wide applicability. ●Excellent Material This gear router bit is made of high quality high speed steel, which is strong, practical, not easy to corrode and oxidation resistant. ●This gear router bit is made of high-speed steel, which is strong and robust and has a long service life. Its quality is guaranteed ●Size: this gear router bit has a uniform size, proportions, an insert length of approx. 5 mm / 0.2, an insert diameter of approx. 6 mm / 0.24 and an engagement angle of 20°. ●This gear router bit is a special cutting tool specially designed for milling gears. Can be used without hesitation