Versatile: takes 2 or 3 legs. Converts into outside puller with the legs U.306G1 + screw U.20B1 or legs U.310G2 + screw U.310-250-10. Comfort: self-gripping legs by return spring. The puller stays in rolling position even when not in tension. Safety: legs locked in position on the bearing using a knob. No risk for the puller to escape from the bearing. Adaptable puller accessories: hydraulic screw U.3 and slide hammer U.2.