ER11 Spring Steel Collet Set - Gripping range: 1.0 mm, 1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm, 3.5 mm, 4.0 mm, 4.5 mm, 5.0 mm, 5.5 mm, 6.0 mm, 6.5 mm, 7.0 mm, plus 1/8 inch and 1/4 inch; collet height: 18 mm. - Material and performance: made of high quality spring steel for stable, dependable clamping. - High-precision components: finely processed with good elasticity and high precision. - Usage with collet chuck: insert the collet into the collet chuck nut before inserting into the collet chuck. - Packaging: individually packaged; each collet is in a separate protective container with label. - Compatibility and notes: suitable for standard ER11 collet chucks, providing precise clamping for small tools. - Applications: - CNC milling, engraving, and drilling of small-diameter tools in metal, wood, or plastic. - Jewelry making and model work requiring tight tolerances. - Electronics and micro-machining tasks, including deburring and fine finishing.