I've got some Westalee rulers and some HandiQuilter rulers. I like the HQ rulers where the presser foot has to be inside the template (like circles), because there isn't a "key" that has to open and close. There's just a slit that's small enough to get the foot shaft through. Westalee has a ton of great rulers. I'm really having fun with the circle tool.
https://www.sewsteady.com/collection...m-template-set But you absolutely have to have a ruler foot for your longarm to use this one.