When selecting strong sewing machine needles, it’s crucial to consider the type and weight of the fabric you will be working with. For instance, a size 90/14 heavy-duty needle is suitable for thicker fabrics like canvas and upholstery, while a 100/16 needle can handle even tougher materials. Additionally, it’s important to match your thread type with the needle; for example, using heavier thread with a needle designed for thicker materials ensures that both components work harmoniously.