29 Pcs ER40 Precision Spring Collet Set, High Precision Spring Clamping Collet, Suitable for Milling Machines, Engraving Machines, Machining Centers

Build to Last: Made of premium 40cr with a cutting process, this product is impact-resistant and not easy to deform, ensuring its long-term service life Wide Clamping Range: The 29 pieces of collets of different specifications allow for a wide clamping range (1/8''-1'') to meet your different needs Stable Clamping Force: Once tightened, it provides a consistent and reliable clamping force, preventing tool slippage during high-speed machining Thoughtful Design: Each collet has an independent packaging to prevent collision and wear during transportation and storage and to avoid confusion between collets of different sizes. It has a built-in self-release design and tools will not get stuck in the holder Easy to Use: The product does not need assembly itself, and you can start using it immediately without professional training, which is user-friendly and effort-saving