A knife with a replaceable blade used for cutting open boxes. Also known as a utility knife.
These types of knives come in two basic setups: a solid blade or a snap(off) blade. The solid blade uses a single solid blade that requires replacing when it become dull. The snap blade design uses a single long segmented blade with which you can snap off the leading end when it dulls to once again have a sharp tip. The blade can then be replaced after you run out of usable segments.
The most common style depicted on AIBooru is the snap blade design, this may be due to the fact that the snap blade design was introduced by a Japanese company in 1956.
