18mm X 1.8mm Stainless Steel Spring Bar Pins for Attaching Watch Band to Watches or Buckle (Set of Two) These Spring Bars by SWISS REIMAGINED are made to exacting standards, the body and spring loaded ends are manufactured in marine grade 316L stainless steel, internal spring is manufactured from spring tempered 304 stainless steel. The body of the spring bar is extruded for extra strength.