Precise Pro-Series ER Spring Collet Sets With Rack

• ER-16 Series – Major Diameter: .670″, Overall Length: 1.052″
• ER-20 Series – Major Diameter: .830″, Overall Length: 1.230″
• ER-32 Series – Major Diameter: 1.300″, Overall Length: 1.578″
• Runout <.0002"/.005mm.
• Made of high grade alloy tool steel.
• Hardened and precision ground to 44-48HRC.
• Surface treated to reduce rust and improve hardness.
• Exceeds Federal specifications.
• Inside diameter has been ground to reach mirror finish for increased grip force.

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