Flush Trim-Plunge Router Bit | 3/8 Dia x 1/2 x 1/4in Shank
Multi-Bearing Pattern Router Bit Set
Replacement Router Bit Guide Bearing, 1/4'' I.D. x 5/8'' O.D. | Rockler Woodworking and Hardware
StewMac Router Bit Bearings: Ball Shaped 3/8" diameter | Madinter
Yakamoz 2Pcs 1/4'' Shank Top and Bottom Bearing Guide Flush Trim Pattern Router Bit Set Woodworking Cutter Tool with 10 Pcs Top Mounted Replacement Bearings - Amazon.com