10 Cards of 50 Heritage Glass Head Pins Assorted Colours Size 48mm x 0.80mm Whitecroft Heritage Premium is a range of quality products for the discerning user. Glass Headed Pins are one of the most popular pins to use in dressmaking and crafting. They are nickel-plated steel making them strong so they won't bend. Use these pins when you need to iron with pins as they won't melt under the heat.