Expand-O Pliers, 10", Reverse-Action Clamping Pliers, Clamping Pressure: 900 LBS (410 kg), Min: 1-3/8" (35 mm), Max 2-3/4" (70 mm), PE10, Strong Hand Tools https://www.amazon.com/dp/B00JXDSXP4/?tag=jkforum-20
you all think something like this would expand the space between the metal ?