Features Selected Spring Steel: These spring clips are made of the selected spring steel and used for CNC milling machine tools and working carving machines. With A Protective Storage Box: There are a spring collet set, which can basically meet your needs. Each clip is installed in a separate protective container with labels, so you can easily distinguish them. Professional design: The chuck collet adopts professional design, has a compact appearance, is easy to carry and use, and can quickly complete and uninstall quickly. Good Elasticity: Workholding engraving collet have fine workmanship, good elasticity and high accuracy , have a lightweight and delicate shape, which can satisfy our use well. Application: Big clamping force and wide clamping range, widely used in machining centers,general milling machines, CNC milling machine, engraving machine, high-speed machines, and other processing. Features: 1.Made of specially formulated spring steel. 2.Hardened and precision ground. 3.Built in self-release design and tools will never get stuck in holder. 4.Big clamping force and wide clamping range, widely used in machining centers,general milling machines, CNC milling machine, engraving machine, high-speed machines, and other processing. Package Included: 10 x Spring Collet Package List