Jaspo, TPU Material Wheel Trainer, also known as a Skateboard and Quad Roller Skate brake or skateboard and roller Skate stopper, is a device or accessory that can be attached to a skateboard or roller skate to help stop or slow down the skateboard or roller skate. Skateboard wheel trainers slow things down so you can learn the skateboarding trick faster, learn the muscle memory, and ultimately get the trick Much Faster. The Confidence you get from stabilizing the board makes it so much easier to learn the trick faster. Skater trainers work because you get to have more FUN on your skateboard faster. When you have more fun, you stay excited, get your confidence up, and learn faster. It is useful for individuals who may have difficulty using stunts and tricks. These are useful for beginners and learners who are new in their skateboard and roller skate journey. Package Includes- 4 Pieces TPU material Skateboard and Roller Skate Wheel Stopper|Trainer.