Some examples of bags that may use D-rings include:

1. Backpacks: D-rings can be used in backpacks to attach gear, secure items, or as part of the strap design.

2. Messenger bags: D-rings can be used in messenger bags to attach shoulder straps, adjust the length of the strap, or secure items.

3. Tote bags: D-rings can be used in tote bags as attachment points for handles or as a decorative element.

4. Duffel bags: D-rings can be used in duffel bags to attach shoulder straps or as part of the design of the bag's closure system.