Stanley knife
noun [ C ] UK trademark uk/ˈstæn.li naɪf/ us/ˈstæn.li naɪf/ (US utility knife, box cutter)
（刀刃可更换或折叠的）斯坦利刀
a brand name for a sharp knife with a short blade that can be replaced or put inside the handle if not being used
Compare: razor knife