Schmetz Serger / Overlock needles. Not compatible with home sewing machines. Has a point suitable for all fabrics. Round shank1.63 mm shank diameter33.0 mm length butt to eye Assorted sizes - Package contains two 75/11 and three 90/14 needles Use needles recommended by your machine manufacturer. Your manual will specify either BLx1 or DCx1 needles. In general, the finer the thread and the finer the fabric that is being sewn, the finer the needle should be. In general, the finer the thread and the finer the fabric that is being sewn, the finer the needle should be. - See more at: http://www.schmetzneedles.com/schmetz-needle-primer/#sthash.QlaFPGda.dpuf In general, the finer the thread and the finer the fabric that is being sewn, the finer the needle should be. - See more at: http://www.schmetzneedles.com/schmetz-needle-primer/#sthash.QlaFPGda.dpuf In general, the finer the thread and the finer the fabric that is being sewn, the finer the needle should be. - See more at: http://www.schmetzneedles.com/schmetz-needle-primer/#sthash.QlaFPGda.dpuf