The 2-fingers Grippex is very useful when pulling square, rectangular and irregular profiles such as cast profiles.
Grippex 2-fingers bar puller comes with 3 different sizes. Grippex IITL (twin large), Grippex IITS (twin small) and Grippex Mini. The over-all dimensions depend on the fingers used. For maximum gripping force and minimum interference, use gripping fingers matching your lathe's capacity.