Stride Tool’s IR-50K Heavy-Duty Pliers Set (50R679) includes two replaceable tip pliers for intermediate sizes 1-1/2 in. to 4 in. rings (internal and external) with eight pairs of tips that take the place of 16 separate pliers. A spring ratchet lock mechanism minimizes fatigue by allowing the ring to be compressed or expanded through gradual moves and then locked at a desired size without continued pressure on the handles. Heavy and large rings are safely and easily controlled with the pliers and tips mount directly to pliers for maximum stability.
Link: Stride Tool