This is the Dive Rite Marine Grade Stainless Steel Bolt Snap Features: Made of marine grade 316 stainless steel Heavy-duty bolt snaps are designed for saltwater use Feature swiveling bases for ease of connection (exception: the Double ended bolt snap snap does not feature Swivel) Each bolt snap is meticulously inspected at our factory to ensure smooth edges that won&';t cut fingers and that gates open and shut reliably Swivel Bolt Snaps available in three sizes: HW1025 Small (3-inch), HW1026 Medium (3 3/4-inch) and HW1092 X-Large (4 5/8-inch) Double-ended bolt snap features gates at both ends that allow for quick and easy temporary connection of two items and measures 4 3/4-inch Quality, marine-grade stainless steel clips with countless uses, always keep a few in your dive kit!