Bosch CC2430 Clic-Change 3-Piece No. 6, No. 8, and No. 10 Self-Centering Bit Assortment
Lowest price in years.
$4 less than Home Depot.
If you need to add a rail with a pre-drilled hole into wood or anything else, these will eliminate the wobble, e.g. T-track into slot for router table or hinges into a mortise.