Klasse Machine Needles go through 163 quality checks, earning the industry's highest quality rating for, stability at high speeds, seam appearance, clean stitch holes and precise and uniform stitchability. Each needle has a unique number stamp identifying its point style and size. Jeans/Denim needles have a very sharp point and strong shank to enable this needle to penetrate dense fabric without deflection. Great for denim, heavy twill, canvas, heavy linen and other densely woven fabrics. Use with cotton, synthetic, blends, cotton wrapped polyester, 100% polyester and topstitching threads. Size 90/14 6pc