Strengths and Benefits: Precision ball bearings made of high-quality steel, coated with plastic. Application focus: Replacement ball bearings for flush trim routers for processing mineral materials. Suitable for HW flush trim routers with ball bearing at the bottom, shaft 12 mm, order number 492661, packaged for retail. Performance without compromise thanks to the Festool Service. The direct, practical, and comprehensive service for you and your tools.