Klasse' Top Stitch Needles Size 100/16 5 German-Engineered Steel Machine Needles The extra large eye is made to accomodate a thicker topstitching thread. The extra sharp point is specially designed to allow the needle to penetrate easily through all 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