Klasse' Denim Needles Size 80/12 5 German-Engineered Steel Machine Needles This needle is ideal for denim, canvas, and other tightly woven fabrics. With is sharp, strong point it penetrates dense fabrics with ease. It also works great for topstitching woven fabrics. With a unique curved design at the clearance-above-the-eye "CAE" stress point distributes pressure equally which makes Klasse needles much stronger then other flat conventional needles