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https://www.amazon.com/COLLETS-PRIME-QUALITY-TESTED-0-0003/dp/B01N42FGL7 from www.amazon.com
Rating (4) · In stock
Suitable for R8, MT, CAT, BT chuck holders. Made from alloy spring steel and hardened to HRC 44-48. Tested T.I.R: 0.0003"; Indicated fractional size is TRUE ...