The PROTO SCS is the original and first Standard Compression System that has become the industry standard since its inception. Created, designed, tested, manufactured and Patented in Vista, CA by Andrew Broussard. His ideas became his realities through the creation of parts specifically designed to make a stronger, lighter and better performing scooter. Since its inception in 2008 PROTO has been the bench mark that all others have followed and evolved from. They prides themselves in being on the innovative forefront of freestyle scooter product development and design. The 4 Inch PROTO Scooters Full-Knuckle SCS works with both Standard and Over-Sized handlebars. This SCS is built to perform and last and carries a Lifetime Warranty against cracking.