Entomology Pins from Merchant & Mills.
These pins are brilliant for soft and smooth fabrics such as silks, lace, lining and fabrics, that tend to slip off the regular pins.
The black enamel surface makes sure the pin will stay in the fabric. The pin is slightly longer than regular dressmaking pins and is slightly bendable.
The pins are a great help in fine fabrics but do not use them for other purposes, as that will wear them out too quickly. Be careful to store them in a dry place, to avoid rust. If your pins get damaged, they are no longer suited for fine fabrics. Until then, you are going to love them.