You get what you pay for. If you are a Serious Modeler these knives simply will never do. The case is sad. It will never latch and flexes easily. The few blades that come with are very flimsy and dull fast. The blades are stuck to a lame-ass magnetic strip. A pure waste, unless you are 8 years old and on a budget. Otherwise, X-Acto is the only way to go... including blades.