I can't find the actual one I got but it's similar to this
King Will Intertwine 8mm Spinner Ring Stainless Steel Fidget Ring Anxiety Ring for Men Black/Blue/Silver https://www.amazon.com/dp/B07B9QGF8H/ref=cm_sw_r_apan_glt_fabc_XZCZY35ATTZATAAXFP8V?psc=1
I got my son the same one.