ITEM NAME:11PCS ER16 Collet Chuck Set ER16 Spring Collet Chuck Set 1-10MM for CNC Eng T9S1 11PCS ER16 Collet Chuck Set ER16 Spring Collet Chuck Set 1-10MM for CNC Eng T9S1 Select high-quality spring steel. Hardened & precisions ground. Big clamping force and wide clamping range , Widely used in machining centers, general milling machines, CNC milling machine, engraving machine, high-speed machines, and other processing. (with ER16 nut and supporting the use.) Name:ER16 Collet Chuck Material:Spring Steel Color:Silver Size:1mm, 1.5mm, 2.5mm, 3mm, 3.5mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm Quantity:11 Package Contents: 11 * ER16 Collet Chuck