Features 1、40Cr Steel: The ER16 collet chuck set is made of 40Cr steel, which is fully hardened, very durable and strong, suitable for your long term use. 2、High Accuracy: 0.015 mm/0.0006 inch accuracy, 1/4in clamping diameter, fine workmanship, used for CNC engraving machine lathe milling cutter. 3、Accuracy Grinding: The appearance of the ER16 collet chuck is accuracy ground to achieve precise fit and maximize accuracy. 4、Wide Application: Collet Chuck is widely used in machining centers, general milling machines, CNC milling machines, engraving machines, high speed machines, etc. 5、Stable Performance: ER16 1/4in Collet Chuck is small in size, light in weight, easy to carry and store, convenient and quick to use, and stable in performance. Specification Item Type: ER16 Collet Set Material: 40Cr Steel Color: Silver Model: ER16 Accuracy: Approx. 0.015mm / 0.0006 in Size: Approx.16.5mm / 0.65in, Approx. 6.35mm / 0.25in, Approx. 27.5mm / 1.08in Clamping Diameter: 1/4in Purpose: Used for CNC Engraving Machine Lathe Milling Cutter Package List 1 x ER16 Collet Set