Philly entrepreneurs who created a kid-safe saw for cardboard will cut their teeth on tonight's episode of "Shark Tank." ...

Specially designed for precisely removing cardboard box tops, Martor's latest safety cutter features a body assembly identical to its Handy knife series along with the new Edge Guide 9960 ...

To check if the blade is sharp, you can have a go at slicing a piece of cardboard. If it cuts easily, your box cutter is sharp! If not, you can repeat the process. Keep in mind, you can also use a ...