Details: *High Precision Collet Chuck Heads for Engraving Trimming Carving Machine Electric Router Milling Cutter. *100% brand new and high quality *Made of high quality material, durable and practical to use *Used for chuck conversion of trimming, engraving machines *Material: Carbon Steel *Specific size:As picture show *Hole Diameter: 6mm / 8mm / 6.35mm(1/4")(Optional). *Quantity:1/3pcs Package Contents: 1/3pcs*Router Bit Collet Chuck Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. Excellent product quality, stylish appearance design, effective use effect, product production goes through a strict screening process The product is of good quality, durable, precise in size, and full of design Use simple small objects to greatly improve the quality of life Please read the item description carefully to understand the size of the product and the content of the package The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness