This needle is perfect for heavy weight woven fabrics such as canvas or denim. The large embroidery eye prevents thread breakage and fraying when used with 40 weight or heavier embroidery thread. It also works well for metallics. The titanium coating allows for less friction on your needle, which prevents dulling of the tip and wear on the needle. This means you can use them five times longer than a non-coated needle. These needles should be replaced after 25-30 hours of actual sewing or embroidery time. The sharp tip of the needle pierces woven fabrics for a perfect stitch. 10 needles per pack.