A real good clamp-type "vise-grip", Knipex seems to be a very good brand. Good value for money. For now, only used 2 times, but the quality of manufacture of the tool inspires confidence when it was in hand. The size of this particular model (25 cm long) allows for a good grip and good leverage if necessary, without being too bulky. The shape of the jaw allows use on multiple types of forms.