Clotilde IBC Glass Head Silk Pins never snag delicate silks or cottons. 1 3/8" long, they are the sharpest, smoothest pins made. They bend, but don't break and fly into helpless eyes. Clotilde has used them for over 30 years. These pins have a very thin fine .50 mm steel shaft. Glass heads won't melt when ironed over. 250 pins per box.