Taper Bushing: 1.Super high quality with lowest price 2.Good interchangeablity & high strength 3.Smooth surface Taper Bushing:1. European Standard Type: ... , 4545, 5050.2. QD type: JA, SH, SDS, SD, SK, SF, E, F, J, M, N, P, W, S.3. Material ... :1. Standard method for measureing keyseat depth.2. Excellent and high quality control, advanced producing equipment.3. Easy to install with long ...