Check the listing for details. 18PCS Spring Collet Set for MT3 ER32 CNC Engraving Machine & Milling Lathe Tool. Color: Silver, Condition: New. Listed at 47.76 USD. Description:Build to Last: High-toughness steel and aluminum alloy combined with a hardening process give this item excellent durability, good wear resistance, corrosion resistance, and resistance to deformation, making it suitable for your heavy-duty work.High Accuracy: The serrated design and precise card slot can avoid deviation during the working process, ensuring smooth milling and improving its accuracy(0.0006"). The large clamping range (0.08-0.79in) reduces the number of collet changes and increases productivity.Complete Kit: The 18 different sizes of spring collet set are highly versatile, allowing you to change to different sizes for different job requirements. In addition, a spanner and collet holder are included for more convenient use.Easy .