Description:High hardness, heat-resistant, rust-proof and wear resistant engraving collet can be used on woodworking CNC routers, engraving machine, trimming engraving machine and more.Without any complex tools, you can replace the old or broken collets directly because these engraving collets are suitable for 6mm, 6.35mm and 8mm standard grinding bits perfectly.It is made of high-quality high speed steel material.There are 3 different sizes for you to choose from.This product is perfectly suitable for factory, repair shop, woodworking, etc.Item Name: Engraving ColletMaterial: High Speed SteelNut Diameter: 17mmNut Inner Diameter: 12.7mmThread Diameter: 7mm, 8mmSize Details: Style A: 1.1cm x 1.1cm x 0.84cm/0.43" x 0.43" x 0.33" (Approx.)Style B: 1.1cm x 1.1cm x 0.84cm/0.43" x 0.43" x 0.33" (Approx.)Style C: 1.1cm x 1.1cm x 0.7cm/0.43" x 0.43" x 0.28" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Engraving Collet1 x Nut