DCC Concepts DCR-P100 Point Rodding / Track Fixing Pins.
100 hardened and gold plated pins for fixing of rod stools, track or many other things around the layout. Small and subtle but very strong, the gold plating also makes then easy to solder to.
Caution - they are hard, so only use a file or hardened cutters to trim to length. The best fixing pins you will find anywhere.
These also come in packs of 500 (see related items below)