Freud  Multi Size  Steel  Router Bit Beari *Radius: Multi Size in. *Material: Steel *Product Type: Router Bit Bearing Set *Number in Package: 5 pc. *Packaging Type: Carded *Drill Bit Diameter: Multi Size in. *Includes: (2) 1/2" bearings, (1) 3/8" bearing, (1) 22mm bearing, and (1) 2.5mm wrench *Lubricated with a high temperature lubricant to withstand the stresses of turning at 22,000 rpm *Shielded to keep out the unwanted wood dust and chips that greatly reduce bearing life*For use with most Freud router bits (sold separately)