Designed specifically for heavy-duty denim and thick fabrics, SINGER Denim Sewing Machine Needles feature a reinforced shaft and extra-deep groove to prevent skipped stitches and thread breakage. The Size 100/16 needle penetrates dense materials with precision, delivering strong, consistent seams every time. This 5-count pack ensures you have reliable needles on hand for your denim projects, upholstery work, and other demanding sewing applications. Compatible with most household sewing machines, these professional-grade needles are essential for anyone serious about quality stitching on heavy fabrics.