Everbilt 1/2 in. x 2-3/8 in. Nickel-Plated Swivel Trigger Snap 44164 - The Home Depot
carbine hooks, snap hooks - snap hooks, swivel eye - Robert Lindemann KG
Amazon.com: SHONAN Large Stainless Steel Swivel Snap Hooks, 2 Pack 4.6 Inch Heavy Duty Boat Hooks, Large Spring Hooks for Boat Anchor Ropes and Cables : Sports & Outdoors