High Quality Material: High precision electric wood with round head. Through the use of high-speed steel, it has good flexibility and wear resistance. High precision electric spindles for woodworking can achieve excellent results. Convenient and Efficient: 3-jaw construction provides excellent contact and stronger grip with bit/cutter . Light and easy to carry, high precision, tight and stable clamping, improve work efficiency. It is the perfect choice for woodworking. Split Sleeve Converter: Precise clamping force and good clamping stability. Suitable for reconditioning engraving machines and woodworking spindles. Suitable Size: We offer you three sizes of 6mm, 6.35mm and 8mm. Three spindle head specifications can meet different requirements. Suitable for engraving machine, wood router, engraving machine, etc. Wide Range of Applications: These chuck adapters are suitable for installation and modification of engraving machines, wood milling, engraving cutters, mold making, cutters, wood engraving heads, increasing the use of stationary engraving heads. Features: Three different sizes to meet your needs. The perfect helper to improve work efficiency. Portable clamping, high precision, tight and stable, improve work efficiency. High precision, suitable for engraving machine, wood router. < /p> Specifications: Material: Carbon Steel Color: As the picture shows Size: As the picture shows Quantity: 5 Pcs Notes: Manual measurement error 0.5mm Package Includes: < p>3 x Collet Chuck Adapter 2 x Screws Service Guarantee: If you have any dissatisfaction or any problem about our product, please email us and we will get back to you within 24 hours.