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https://www.amazon.com/Elasticity-Frequency-Quenching-Resistant-Workholding/dp/B0BYXWVBWX from www.amazon.com
$11.28 30-day returns
... Large Elasticity Carbide High Frequency Quenching Non Cracking CNC Spring Collet Heat Resistant Tight Clamping for Workholding (D=21mm) - Amazon.com.
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