HD⚡SWITCH: Engineered Performance HIGH QUALITY: Precision Machined Accuracy ULTIMATE PROTECTION: Synthetic Grease Formula with High Wear-Resistant Additives LONG LASTING: High Temperature Grease Rated to 400F Buy with Confidence. Our bearings are Engineered to provide Maximum Performance for the Most Demanding Applications. Each Precision Machined Bearing is made using the Highest Quality Steel to Provide Superiour Accuracy and Reduced Friction. By minimizing the amount of friction we are able to Increase Bearing Life, and more importantly, Decrease Downtime. Better Quality, Longer Life, Less Downtime.