... a style, level 3 rolling bearing and two way thrust, steel ball lock, center, suitable for high speed often.2.And ... : :for no drill style, level 3 rolling bearing, a thrust, steel ball lock, deduces the center. Suitable for high speed.3 ... style, level 2 rolling bearing, a thrust, small shaft sliding, steel ball lock, suitable for high speed.4.Bit bearing no ...