Round Corner punch in a choice of three sizes (size given by measuring from point to point across the blade):

Small 14mm (9/16")
Medium 22mm (7/8")
Large (29mm 1 1/8")

Heavy duty round corner punch to help get neat rounded corners every time. The punch has a white painted line to give the centre position to get accurate corners.

To preserve the life of the tool push into a beeswax block before use and make sure you use a proper cutting surface such as poundo board to avoid damaging the blade.