Feature: 1. Applicable: Collet chuck is suitable for all kinds of grinding machine clamping grinding device, suitable for repairing and grinding tires. 2. High Carbon Steel: CNC spring collet chuck is made of high carbon steel material, robust and durable, stable performance and good convenience. 3. 4 Jaw: The CNC lathe spring collet chuck four jaw construction provides good contact and a more powerful grip with the bit or burr. 4. Wide Use: 4 jaw lathe spring collet chuck is widely used in machining centers, ordinary grinding machines, CNC grinding machines, engraving machines, high speed machines and other processing. 5. Simple Installation: These lathe spring collet chucks are well designed and easy to install and disassemble, and can directly replace the old or damaged parts to obtain higher strength. Specification: Item Type: Spring Collet Chuck Material: High Carbon Steel Collet Chuck Specification: d=5.5x4.3, d=5.5x4.5, d=5x4, d=6x4.5. Package List: 4 x Collet Chuck4 x Storage Canister