Safety: Shear head screw. Total locking of the jaws via a knurled knob. Easy conversion from outdoor to indoor use. Versatile: 2 or 3 jaw mounting. Self-tightening jaw puller with return spring. Jaws are locked in position on the bearing using a knurled knob. Capacity from Ø 25 mm to Ø 260 mm. Usable jaw length 220 mm. Safety: Jaws are locked in position on the bearing using the central nut. Shear head screw: a pin shears if the permissible torque is exceeded (supplied with 2 spare pins).