Starting Sept 1 2008. Most of the 1/15, 1/16 metal tracks are fitted with new pins like the picture. The basic concept is that the pin head is 0.2mm larger than the pin hole of a track link. Once it is hammered into a track link, it will stay still. It can also be removed easily by pushing it with another 1.2mm pin if required. The pins can also be purchased separately. Each set (200pcs) is only US $16 with shipping.