This ER collet is used for CNC milling lathe tools and work holding engraving machines.Collet must be placed into collet chuck nut before inserting into collet chuck.Specifications:Model: ER11Clamping Diameter: 3/16-inchMaterial: 40Cr SteelPrecision: 0.015mm / 0.0006-inchTotal Height: 18mm / 0.71-inchOuter Diameter(Max): 11mm / 0.43-inchPackage Includes: 1 x Spring Collet.
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