Fluco 16mm Silver Butterfly Deployant Clasp Imported To determine your clasp size, measure your strap (in millimeters) where it attaches to the buckle, not the lugs Made in Germany by Fluco, a company founded in 1952 Constructed from heavy gauge polished 316L stainless steel Fits straps up to 4mm thick Replace traditional buckles with a stronger, safer buckle connection