QTY 4 - 3/4" FORGED D RING WELD-ON CLIP | RatchetStrap.com
Amazon.com: CRAFTMEMORE 3/8 or 1/2 Inch Tiny D-Ring Findings Metal Welded D Rings for Zipper Puller Lanyard Purse Making DIY Craft 50pcs (Gunmetal, 1/2 Inch)
CargoSmart Silver D-ring at Lowes.com
Binder Ring Mechanism 3-Ring, 2" Slant 'D' Letter SizeQuality Locking - Bar C Saddlery