10 Piece Wood Boring Drill Bits - DRILL-95210This set of flat bits comes in sizes 1 4, 3 8, 1 2, 5 8, 3 4, 7 8, 1 and 1 1 4 inches. The set also includes an 11 1 2 inch extension rod, and a hex key wrench to tighten the bits in place in the extension rod. This set is ideal for the carpenter who needs to drill holes in cabinets and doors to install hardware, such as locks sets and magnified viewing portals. The extension rod will be useful when drilling through ceilings and floors to install