RUKO TOOLS, 5/8 in Cutter Dia, 2 7/16 in Max Cutting Dp, Annular Cutter - 783YK1|108653F - Grainger
RUKO 214851RO Jobber Length Drill Bit Kit, High Speed Steel (M2), Ground with Split Point, 1/16" to 1/2" (Set of 29): Amazon.com: Tools & Home Improvement