$66.99 Century Drill and Tool 38732 Ship Auger Wood Boring Bit, 1/2-Inch x 18-Inch 81838387327 | eBay
Square Hole Drill Bit for Wood 1/2 Hollow Chisel Mortiser Auger Cutter - Walmart.com - Walmart.com
DIABLO 1-1/2 in. x 17-1/2 in. High Speed Steel Auger Bit-DAG3160 - The Home Depot
