Features 1、Ideal chucks for CNC milling and engraving machines 2、The model is ER32, there are 19 chucks in the kit, and the clamping range is 2mm‑20mm 3、Each collet is clearly marked, so you can easily distinguish them 4、The collet has fine workmanship, good flexibility, high accuracy and low runout tolerance 5、Built-in automatic release design and tools, never get stuck on the stand Specification Product description: Model:ER32(19pcs,2mm-20mm) Made of high grade specially formulated spring steel. Hardened and precision ground. Built in self-Release design and tools will never get stuck in holder. Gripping Range 2MM to 20MM Accuracy : 0.01mm Package included: 19 pcs ER32 Spring Collets (2mm-20mm) Package List