Dụng cụ mở hộp có lưỡi răng cưa

This box cutter/opener is serrated so it can cut through thicker paper labels or tape.  I've tested it by cutting through corrugated cardboard.

This is inspired by ART TOO's BOX OPENER V2.0 - TESTED, but it's an original design.  I didn't modify their design to make this one. 

WARNING: The serrated edge and tip are quite sharp.  Please handle like you would any other sharp knife-like object.  Use at your own risk.