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- Total runout less than .0003 on these precise ER40 collets
- Made from Alloy spring steel and fully hardened
- All critical collet surfaces are precision ground for accurate fit
- Works in all ER40 Collet Chucks
- These ER40 collets have a full .039 range of collapse
- This ER40 collet has a range of .250-.211 inches
- MariTool Part# is .250-ER40-1/4
