For use with rayon and other specialty machine embroidery threads including polyesters. The special scarf, long smooth groove, and large eye, of this needle protect these more fragile threads and guard against excess friction. The shank(top part) of these needles have one flat side and one rounded side. These will fit all "household" models of Brother, Janome, Singer, Pfaff, Bernina, Viking, Elna, Kenmore, Baby Lock, Simplicity, Necchi, White and many others.These will fit all "household" models of Brother, Janome, Singer, Pfaff, Bernina, Viking, Elna, Kenmore, Baby Lock, Simplicity, Necchi, White and many others. The shank(top part) of these needles have one flat side and one rounded side. For use with rayon and other specialty machine embroidery threads including polyesters. 5 packs of needles. Each pack contains 5 needles, for a grand total of 25 needles. Size 75/11 is perfect for lightweight to medium weight fabrics.Date First Available: April 24, 2016. Manufacturer: SCHMETZ. Item Weight: 0.32 ounces. Is Discontinued By Manufacturer: No. Best Sellers Rank: #30,303 in Arts, Crafts & Sewing. Customer Reviews: 4.8 out of 5 stars 1,083 ratings 4.8 out of 5 stars. : B01EPOFAQ0. Item model number: 1745. Product Dimensions: 6 x 4 x 0.5 inches.