In a Halloween-day post on Instagram, former FedExCup champion Justin Rose revealed an equally mysterious set of irons, showcasing no other logos aside from his personal “JR” logo.

The golf world was abuzz trying to figure out which equipment manufacturer designed and built the set.

Luckily, we didn’t have to wait long to find the answer.

Rose revealed shortly after, in a comment on the GolfWRX Instagram page, that Custom Golf Works at Gatwick Studio custom-built the irons. He later confirmed via Instagram DM with GolfWRX that the iron heads themselves were manufactured by Miura, much like Scott’s custom irons. While Rose is not entirely positive if and when the custom “JR” irons will go into play, he’s giving them serious consideration.

Most players do the bulk of their equipment testing in tandem with a company’s reps – often at tournaments, a company’s home office or the player’s home course – but Rose has used Custom Golf Works, an independent, off-site clubfitting facility, multiple times this year. They also helped fit him for the Titleist 620MB irons he was using earlier this year.

The fitter boasts a decade of fitting players on the DP World Tour but also is open to the public. It isn’t affiliated with a single equipment brand. When Rose switched to Titleist clubs earlier in the year, it was simply because the irons won out over other brands he was testing.