ER11 13-piece spring clamp set (1-7 mm) for CNC engraving and grinding machines

High clamping force, wide clamping range, high precision. Concentricity tolerance: <0.003 mm. Made from specially formulated high-quality spring steel, premium 1065 carbon steel. Widely used in drilling, CNC milling, turning, threading, grinding, and engraving tools. Package contents: 13 high-force ER11 collets