Precise Pro-Series High Speed, Balanced CAT 40 ER-20 Collet Chuck - 3900-2065

• Made of 20CrMnTi alloy steel
• Electrolysis nickel coating
• Balanced to 18,000 RPM
• Tolerance is .0003" Maximum
• 5/8”-11 Drawbar
• Superior Finish & Craftsmanship

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