FEATURES [QUALITY MATERIAL]: The milling cutter adapter is made of high quality steel, lightweight and flexible, wear-resistant and durable, high strength and high hardness. [EXCELLENT PERFORMANCE]: The spring collet is engraved with high precision and clamped tightly and stably, which can improve the working efficiency. Standard Size: Router spring collets are available in three different inside diameters, including 6mm, 6.35mm and 8mm.Height is 20mm. [Wide Application]: Router bit chucks are suitable for carving machine, trimming carving machine, woodworking router, woodworking router etc. Product Information Product Name: Woodworking Accessory Adapter Head Product Material: High Speed Steel Product Size: Refer to the picture Product color: black Packing listWoodworking Accessory Adapter Head *3 Please note: 1. Due to the long transportation time, the goods may be damaged during transportation, if the goods are damaged, please leave us a message through the official website immediately before posting a comment, I will solve the problem for you. 2. Due to manual measurement, the size may have 1-3cm error. 3. 3. The color displayed by different monitors may vary.