Precision 8-Piece ER11 Collet Set. Collet and bore concentricity isless than 0.0004" TIR. TIR 0.0004" / 10 μm. Clamping Range: 2 mm (1/16") to 6.5 mm (1/4"). Manufactured fromhardened alloy steel, heat treated to45 HRC.
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