In Fail 20: I'm Not Popular, so I'll Make Preparations, Tomoko has some kind of cutting instrument that I'm not familiar with. It's like a shaft-type thing with a retractable, squarish blade on the end. It's got me curious about what it is, but identifying it shouldn't be a difficult question, and I'm actually more curious about whether it's something that's normal to have at school. It doesn't seem like anyone else in the chapter is using one, just regular scissors. This makes me wonder if she's even allowed to have one. And considering what happens, it seems like Tomoko probably shouldn't have it.
Where I'm from, people are pretty paranoid about letting kids have sharp instruments. I had one teacher in middle school who didn't even trust us with scissors. And about the only time I had a knife was for cutting linoleum for a linocut print in a high school art class. I'm interested in the cultural differences here.
So, what is this item, and is it normal to have one at school in Japan, or is Tomoko in trouble?