1.Made of high quality spring steel 2.Powerful clamping ability with high precision and stability 4.Adapted for DIN6499B ER-32 COLLETSpot: Standard PartsMaterial: 60Si2MnSpecifications: 1.0,2.0,3.0,4.0,5.0,6.0,7.0,8.0,9.0,10Hardness: 48-55 HRCAccuracy: within a wire (also available within the eight high-precision ER collet U)CNC machine tools for machine tools, CNC machine tools Modeld ...