5-PACK NEEDLES: This set of 5 Superior Threads serger needles are sized #75/11 DURABLE METAL: Chromium-plating extends the life of these Serger needles so you spend more time sewing PROPER STITCHING: Superior Chromium-plated HAx1SP needles have a unique shape that helps keep your stitches in place when sewing on elastic materials or tightly-woven knit fabrics SERGER NEEDLES: The HAx1SP needle is the standard, go-to needle style for Serger and Overlock machines BEST USE: For use with 3-thread and 4-thread sergers; If your machine manual recommends a 130/705H (Universal Needle) needle style, the HAx1SP can be used in its place