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- 5pcs ER20 Nut for clamping collets, balanced to G2.5/25000rpm-NUT-ER20
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*This set including:
5pcs ER20 Nut for clamping collets, balanced to G2.5/25000rpm-NUT-ER20-G25-New.
These nuts can be used for both balanced or un-balanced ER20 collet chuck holders.