Taper Bushing: 1.Super high quality with lowest price 2.Good interchangeablity & high strength 3.Smooth surface ... type: JA, SH, SDS, SD, SK, SF, E, F, J, M, N, P, W, S.3. Material: Steel, Cast iron4. Surface treatment ... high quality control, advanced producing equipment.3. Easy to install with long lifetime, high degree of flexibility.4. OEM and Customized ...