Medical-grade is a phrased coined by marketing literature and adopted by society which implies that a certain product or material is of high enough quality to be used by medical professionals. These could be tool and equipment (e.g. hemostats or needles) or the raw materials for jewellery making (e.g. Titanium, Silicone, or PTFE). However, it has no real meaning since clearly some products have multiple medical uses each of which has its own (different) minimum quality standards. A similar example is that of "Surgical Steel".