Hi-Lok® Removal Pliers, (CRP3579U, CRP2979U, ATSK3579)
The ATSK3579 collar removal pliers offer a more aggressive offset of about 60 degree. The jaw serrations are perpendicular to the collar seating surface when the handles are laid flat, but angle at 3 degrees if the flat part of the head is rested on the collar seating surface. The choice of plier style seems to be a matter of personal preference.
It has been our experience that they do not work as well with large collars, or steel/titanium collars where greater gripping force is required to achieve the required break away torque.