As a Metallica fan, memorabilia is always a cool gift idea. And more than that, this specific cuff is elegant, what's not to love?
It comes with a card certifying the star's name and a note about the crafters. The price is a bit high but I found the Black Friday discount helpful. The delivery time is about 3 weeks but that's understandable considering it's taylor made and shipped from the USA (I live in Europe). No problems at all on customs clearance/shipping, it got delivered directly to my home.
For other items (i.e. pendants) I might suggest ideas such as a design holding both ends of the string in place (like a small version of this cuff).
But for this specific cuff I have no suggestions, it's just perfect!