Hope this helps.
The first type of spin trainer is a plastic rectangle about the size of a large ladies’ shoe. On the bottom is a strip of curved plastic which resembles the rocker on the blade; only it’s a lot wider. When using this skate spinning device, it’s a good idea to invest in a square or circle of plywood about 2 to 4 feet in width and length. This will keep you from traveling too much in your spins, but it will also save the finish on your floor as the plastic device can cause scratches. Also, the spin trainer doesn’t work on carpeting. When doing basic spins, you can wear slippers, shoes or socks, as it doesn’t really matter. You will want to be in a clear area so that you don’t crash into any furniture or slam into walls. If you have no room, try using it in a garage or outside on an asphalt or concrete surface.
The second type of spin trainer is slightly more expensive, but you can use it on any surface. It’s made of rubber-covered steel with ball bearings and a solid base that won’t slip when in use. Slightly larger and heavier than the plastic spinning device, this spin trainer is very easy to use. There are many skaters who claim that spin trainers are helpful and others who don’t think they benefit their spinning. If you are considering investing in one, the cost is about $25-$35, but if you know of someone who can loan you theirs, then you can determine whether you want to buy one or not.
Economy spin trainer:
You can make your own spin trainer in seconds. All you need is a paper plate! You can also spin in a pair of heavy socks. Keep in mind that this is only for learning balance in a spin, and that you won’t achieve too many revolutions.