You're probably looking at the Pacific Tool and Gauge set if you're looking at brownells. If not, they also sell/make them if you wanna look them up. May even be able to find a nice used set on ebay too for a discounted price (maybe).
You can rent a set cheaper if you're not in a hurry to do them and don't mind waiting in line for it to be your turn.
4d rentals.
Advice:
Use lots of tap lube or transmission fluid if you don't have any tap magic laying around.
Stop frequently to both clean the chips out while also allowing it to stay cool. I suggest you stop about every 30 seconds using the reamer. Yes, it'll take about 30-40 minutes to do your first one, but it's better to keep it sharp than to try to resharpen it later.
It's not hard. I've threaded a lot of barrels.
I'll also mention the WIN CHOKE has a lot more chokes available since they're cross compatible with chokes from Mossberg, H&R, Weatherby, Browning Invector, and of course, Winchester. Probably others too. Those are just the ones off the top of my head.
So, if you don't mind screwing a winchester choke into your remington barrel after you get it threaded, I would strongly suggest you go that route instead due to simply having a larger availability of compatible chokes going forward. The name on the side of the choke doesn't mean squat to me. I would prefer if ALL of my guns used the same chokes to make it easier and cheaper for me, But, I digress.
