SUNSTAR Kadomaru Pro Stationery Round Corner Cutter
Superb sharpness even on laminated paper!
This paper corner-cutting tool is perfect for industrial use or as an office tool. You get three sizes in one. The S size cuts corners 3mm round, the M size cuts 5mm, and the L size cuts 8mm. Consider using this in a setting where you don't want young kids or the elderly getting cut on sharp corners.
How to Use:
Insert the corner of a sheet of paper into one of the three size slots, matching up the the angle with the cutter. Make sure the corner is inserted all the way in and press down on the cutter's lever.