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- Total runout less than .0006" on these ER hex shaped collets
- Made from Alloy spring steel and fully hardened
- Internal hex is EDM cut and internal finish is not ground
- Outside dimensions are like regular ER collets and will work in any ER collet chuck
- Do not use for holding round shanks or cutting tools
- This hex collet has a full .03" range of collapse
- This collet is not coolant sealing
- MariTool Part# is ER40-7/16-Hex
