As per the title, this specific armor piece cannot be used with Synthweave to create a Universal Ornament - the option doesn't appear. It would also seem that this is an old issue, according to the same observation being made multiple times: - [url=https://www.reddit.com/r/DestinyTheGame/comments/up4xlc/cant_equip_cinder_pinion_grasps_as_an_ornament/]1[/url] - [url=https://www.reddit.com/r/DestinyTheGame/comments/urkckc/why_cant_i_unlock_cinder_pinion_grasps/]2[/url] [url=https://i.imgur.com/WQ7rH0e.jpg]Cinder Pinion Grasps Locked[/url] [url=https://i.imgur.com/kOJVl8m.jpeg]A Different Locked Ornament[/url] I don't currently have them equipped. EDIT: After a little more searching, I was able to find [url=https://www.reddit.com/r/DestinyTheGame/comments/111unev/are_cinder_pinion_armor_pieces_available/]this[/url]. It looks like the game is in a weird limbo where it thinks you have them unlocked but also knows you don't.