General description 13pcs ER11 spring collet set includes sizes ranging from 1mm to 7mm, designed for use with engraving and milling tools. Made from high-quality spring steel, these collets offer fine workmanship, good elasticity, and high precision, ensuring stable and practical performance. The spring-loaded chuck provides maximum clamping force, making it suitable for various machining applications. Technical specifications Collet sizes: 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 6mm, 6.5mm, 7mm Material: High-quality spring steel Usage These collets are suitable for a variety of applications including drilling, milling, boring, tapping, engraving, and use with CNC and spindle machines. They provide a powerful hold and parallel clamping for CNC engraving machines and milling tools. Other information Each collet is packaged in a separate protective container with a label for easy identification.