Whiteside Bearing 3/4 in. OD x 5/16 in. ID is a high-quality industrial bearing designed to meet the demands of professional woodworking. These bearings are the same as those ly equipped on Whiteside's bearing-mounted router bits, ensuring reliable performance and durability. I for replacing worn-out bearings, they can also be used to interchange with existing bearings to automatically adjust cutting depths or to convert bit shanks into bearing-guided tools for precise template or pattern work. When adding bearings to bit shanks, it is important to use the appropriate lock collar, such as LC14 or LC12, for secure installation. Each bearing is sold individually, providing flexibility for your specific project needs. Manufactured by Whiteside Machine Company in Claremont, North Carolina, this bearing quality and consistency for your routing applications. Model Number: B20