Bronson Speed Co. Jamie Foy Pro G3 Bearings Deep Groove Raceways - Reduced side impact damage and breakage Micro Groove Raceway Surface - Linear micro groove surfaces improve bearing lubrication, speed and spin High Speed Ceramic Oil - Nano ceramic compounds for wear protection: Moisture, rust, corrosion resistant Straight Edge Frictionless Shields - Keeps oil in and dirt/moisture out Max Impact Cage Design - Keeps the balls precision spaced and oil circulating Balls Out Technology - Eliminates shield and cage contact on impact for a go-fast, stay-fast bearing.