This ebay listing include: New Precision 24PC ER40 Collet Set Milling Lathe -US Gripping Range :3MM to 26MM Made of high grade specially formulated spring steel. Hardened and precision ground. Built in self-Release design and tools will never get stuck in holder. DIN6499B 0.013MM (0.0005") Run-Out Tolerance High Grade 1065 Carbon Steel Hardened & Precision Ground.
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