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This set includes 18 individual ER32 collets in 1mm increments.

• Total runout less than .0003 on these precise ER32 collets.
• Made from Alloy spring steel and fully hardened.
• All critical collet surfaces are precision ground for accurate fit.
• Full set covers all collet sizes from .076 to .787 (2mm - 20mm)
• The following mm sizes are included - 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20
• Comes in a plastic collet box
• Box dimensions are 10.25"x5.75"x2.25" tall (with lid closed)