Onepiece ER Spring Collet Chuck designed for versatile tool holding in CNC milling and engraving machines. It supports ER11, ER16, ER20, ER25, and ER32 collets and is configured for the ER2011mm variant shown in the product title. The chuck delivers precise gripping with a tolerance of 0.005 mm to 0.008 mm, helping to maintain accuracy during operation. Key benefits Wide compatibility: accepts ER11, ER16, ER20, ER25, and ER32 spring collets, increasing toolholding flexibility across multiple projects. Precision grip: gripping tolerance of 0.005–0.008 mm supports accurate machining and stable tool performance. Dedicated for CNC milling and engraving: suitable for use with CNC milling tool holders and engraving machine spindles. Compact, singlepiece design: simple, robust construction that reduces setup complexity. Variant specificity: configured as ER2011mm to match the model configuration referenced in the title. Key attributes Model variant: ER2011mm Functionality: ER spring collet chuck for holding various ER collets Compatibility: ER11, ER16, ER20, ER25, ER32 collets; for CNC milling tool holders and engraving machine spindles Size/fit: onepiece configuration corresponding to the ER2011mm variant Performance: gripping tolerance 0.005–0.008 mm Use cases CNC milling with mixedtooling: switch between different ER shank sizes (ER11–ER32) on a single spindle to complete a multistep job without changing the tool holder. Precision engraving: secure smalldiameter end mills during precision engraving tasks to maintain consistent feature dimensions. Prototyping and workshop work: enable rapid tool changes and reliable clamping for smallbatch production or testing of toolpaths. This description preserves the product's stated brand scope, model, and features, while presenting clear, customerfriendly information on benefits, attributes, and practical applications.