Ultra Grip, Heat Resistant, 50pc. Taylor Seville Originals Notions make your sewing life easier. The Ultra Grip Patchwork Fine Magic Pins are 0.6 x 36mm. They have Ultra grip rings for comfort and control and makes picking the pin, easy. The Ultra Grip Magic Pins are also heat resistant, so if you iron over them, they will not be ruined. The pins come in a designer storage case that closes, so you won’t lose any pins!