Bronson Raw Skateboard BearingsFree at Last! Shield Free Design 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. Fast, Slick & Non Stick Tungsten Coated Races Micro thin tungsten dry lubricant coating is fast, slick and non stick to minimise dirt, dust and crud build up. Tungsten coating is an extremely slick, low drag, long life dry