Manufactured by one of Europe's premier disk brake experts - an O.E.M. manufacturer to many well-known brands. Totally integrated manufacturing with control over EVERY aspect of the product. The very latest in German aerospace materials and ISO Certified quality management. Using the latest technology in materials, processes and finishes. Laser cutting for accuracy to the ten thousandth of an inch! CNC billet machined aluminum carriers for accuracy, strength and light weight (where applicable). Designed and developed specifically for increased braking ability and longevity. Direct bolt-on performance increases. Computer aided design insures maximum strength and minimum weight. Specially ground to insure perfect concentricity and parallelism prevents warping. BikeMaster M.A.S. Technology (Maximized Area of Surface). Made in Spain. Sold individually.