13 PCS ER11 Spring Collet Set for CNC Engraving Machine & milling Lathe Tool Size: ER11 13pcs, Home Improvement ToolGripping Range:1MM to 7MM (1mm,1.5mm,2mm,2.5mm,3mm,3.5mm,4mm,4.5mm,5mm,5.5mm,6mm,6.5mm,7mm)?
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