If you want to open, inter alia, recent MacBook models are already fails to unnecessarily "made different" screws (screw heads). Of course, you then tried the same any screwdriver and everything but is just palpable without proper tool ridiculous screw heads only be destroyed and then you only get even bigger problems. So rather not experiment but equal to procure proper tool. I had this exact problem described. Have ordered the two screwdrivers and get the next day via UPS. Everything fits like a glove and served its purpose. I suspect that the tool is not just suitable for a continuous use in a workshop, there are certainly more expensive versions but at home is sufficient.