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: ER40Clamping Diameter: 1-inchMaterial: 40Cr SteelPrecision: 0.015mm / 0.0006-inchTotal Height: 46mm / 1.81-inchOuter Diameter(Max): 41mm / 1.61-inchPackage Includes: 1 x Spring Collet.
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