Pack of 12 Upholstery Skewers. Upholstery Skewers or Pins for Pinning Fabrics and Material in Position. Available in following sizes : 2-1/2" 3" 3-1/2" 4" These upholstery skewers or pins are of high quality and manufactured to a premium standard. They are used to hold your upholstery work in place prior to hand sewing, replacing sewing pins for heavier work, fabric and materials. Heavy 16 gauge heavy skewers.