H-Tone JJ40618 utility-knife blades are replacement blades for routine cutting tasks with a compatible utility knife. This set is identified by part number BLADES-HT-JJ40618-9.
Each blade is 9 mm wide, the narrower format specified for this item. The pack contains 10 blades, providing a set of spares for ongoing office, school or household use where a utility knife is used for cutting.
The listing identifies these as blades for a utility knife; it does not specify blade material or particular knife models.