[ Material] Collet chuck set is made of carbon steel which is strong, and can use for a long time. [Stable Performance] Collet chuck set has a stable performance due to its precision and quality. [Practical] It can help you make better, more efficient and more processing products.The chuck Can be converted into 6mm handles, 6.35mm handles and 8mm handles. [Size & Package] Package includes 3pcs collet chuck adapters and 3pcs nuts. 6/6.35/8mm collet chuck set meet your different needs. [Wide Application] It is widely used for chuck conversion of trimming, engraving machines. Collet chuck set is suitable for engraving machine, wood router etc. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:As Shown Material:Carbon Steel Package Contents: 1Set * Collet Chuck with Nut(3PCS) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.