Whiteside Bearing 3/8 in. OD x 1/8 in. ID is a high-quality industrial bearing designed to match the equipment used on Whiteside’s bearing-mounted router bits. I for replacing worn-out bearings, it also allows you to interchange with existing bearings to automatically adjust cutting depths. Additionally, this bearing can be added to bit shanks to make bits bearing-guided for precise template or pattern work. When adding bearings to bit shanks, be sure to use the appropriate size lock collar, either LC14 or LC12. The bearing is sold individually, ensuring you get exactly what you need for your woodworking projects. Manufactured by Whiteside Machine Company in Claremont, North Carolina, this bearing reliable performance and durability. Model Number: B1