SkaterTrainer 2.0, The Rubber Skateboarding Accessory for Perfecting Your Ollie and Kickflip - Learn, Practice and Land Tricks in No Time! For kids of all ages the perfect gift for beginners who want to master tricks faster or older skaters looking to re-learn old moves These accessories stop your wheels from rolling, so you can experiment with tricks or work on balance Anywhere begin practicing tricks in your driveway, garage and even inside your house SkaterTrainers work on nearly any skateboard wheels, 49 to 65mm in diameter What do you get? You'll receive one set of 4 trainers and stickers to pop on your wheels and go