Premium Material: The milling cutter chuck is made of high-quality steel, which is light and flexible, flexible, and durable. Stable Performance: The high-precision milling cutter chuck group can firmly and stably clamp various milling cutters. The chuck has high engraving accuracy, tight and stable clamping, which effectively improves work efficiency. Standard Size: The router collet chuck has 3 different inner diameters, including 6mm, 6.35mm, and 8mm. The height is 20mm so that you can easily use them in different occasions. Widely Application: Router bit collet is suitable for engraving machine, trimming engraving machine, wood milling cutter, wood router, etc. It is suitable for automobile manufacturing, mold manufacturing, and mechanical engineering. Increase the use range of the fixed engraving head. Sincerely For You: I believe in investing in good products, so they last longer. If you want the best quality and great customer service, please choose us! If you have any questions, you could feel free to contact us at any time. Your satisfaction is our greatest affirmation.