Material: Our collet adapter is made of high quality carbon steel, which has good flexibility and wear resistance. They are rust and corrosion resistant, durable and have a long service life. Application: Suitable for engraving machines, wood grinders, wood routers, trimmers, engraving machines, etc. The router collet adapter meets your different needs in your daily work. Convenient and efficient: The collet adapter is easy to carry and has high precision. The clamping is firm and stable, and the work efficiency is improved. It is a good choice for woodworking and craft enthusiasts. Package includes: 6 router clamps (2 of each size) + 2 nuts. If you have any doubts, please contact us by email. Note: The data is all measured manually, please allow 1-3cm error due to light and display differences, there may be color difference, please refer to the actual item received.