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
StewMac Router Bit Bearings: Ball Shaped 3/8" diameter | Madinter
3/4" x 1" Top Bearing Flush Trim Bit - Black Forest Wood Co.
Whiteside Router Bits 3000 Template Bit with Ball Bearing - Trim Router Bits - Amazon.com
Yonico Top and Bottom Bearing Flush Trim 2-1/2 in. L 1/2 in. Shank Carbide Tipped Router Bit 14135 - The Home Depot