1) Made of high quality spring steel 2) Powerful clamping ability with high precision and stability Model:J0106J0206J0108J0208J0110J0210,J0210AJ0113,J0113AJ0213,J0213AJ0116,J0116AJ0216,J0216AJ0120,J0220 JJ-00104 Keyless Drill Chuck with Taper Mounted