Bronson Speed Co. Raw skateboard bearings. Shield-free design. Tungsten coated races. Audible speed Technology. Max impact cage. Deep groove raceway. Factory fresh quality. No more shields to get damaged or pop off - the first shield-less bearing designed for skateboarding. No shield grooves in either race for no crud, dust and dirt build up - super fast sound and spin. Micro-thin tungsten dry lubricant coating is fast, slick and non-stick to minimize dirt, dust and crud build up. Tungsten coating is an extremely slick, low drag, long life dry film lubricant with a very low coefficient of friction Tungsten coating works well with or without liquid lubricants. Fully open, high spin, and shield free - RAWs are designed to enhance the sound of speed. Super strong, durable, non-distortion fiberglass filled pure nylon cage keep the balls precision spaced. High wear and tear resistance, increased performance in a low lubricant/increased dust and dirt environment. Balls sit and roll deeper in the raceway channels than weaker shallow groove designs. Dramatically reduces axial and angular side impact damage and breakage, surfaces stay smooth and fast. 100% hand inspected twice and micro-polished and ultrasonic solvent washed 3X prior to final packaging. Packaged in nitrogen filled packaging reduces metal and oil oxidation until ready to be ridden.