All of the bad reviews for this item state they don’t like it because it’s hard to remove from the gutter once they’ve punched the hole. The trick is once you punch the hole to squeeze the handle one or two more times until the shoulder of the die pushes the hole open to make it bigger.
Malco GOP34UK Punch and Die Assy - 3 X 4 in., 76 X 102mm Standard Rectangular Hole
