Headquartered in Klagenfurt, Austria, Hirsch was established in 1765 as a leather workshop and tannery. It remains a family-owned business to this day, and continues to gain recognition for excellence and innovation in watch strap design. Hirsch's beautifully crafted flip-lock-style deployant clasp is made from heavy gauge, solid polished stainless steel. With its handy push-and-click mechanism, the clasp replaces traditional pin buckles for an easier and more secure strap connection. Material: Model BC1009 Hirsch-branded stainless steel deployant clasp Sizing: Available in 16mm, 18mm, 20mm Fits straps up to 3.5mm thick To determine clasp size, measure strap width (in millimeters) where it attaches to the buckle