Amazon.com: Yeebline D Ring Locking Carabiner Hook, 2-Pack 3.1 Inch 304 Stainless Steel Spring Snap Hook for Dog Leash, Key Chain, Outdoor Camping, Swing, Hammock, Hiking : Pet Supplies
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Hillman undefined at Lowes.com
Plastic Snap Hook/Key Clip - Walmart.com
Sea Dog Line Snap Hook - Toothless Key-Lock – Ship to Shore Marine