Spring-loaded, self-tightening claw puller. The extractor holds its position on the bearing even when not under tension. The claws are locked in position on the bearing by means of a knob (no risk of the puller escaping from the bearing). Stem U.40 (assembly with ring and nut U.306A1 to be ordered separately). External 3-grips puller U.306 delivered with 3 internal grips offered.