Singer Dressmaker Pins are not just one trick ponies. Also known as Silk Pins, they can be used to pin a seam when creating a one of a kind design, crafting myriad projects or even creating fun and elaborate nail art. Each one is 1-1/16th of an inch and made of steel. Singer SKU Number: 00349. It comes with 500 Dressmaker pins in each pack (2-Packs)