$50.99 1Pc High Speed Steel 1/2 Drill Straight Shank Twist Metal Drill Bit | eBay
1/2 Straight Shank 18mm Cutting Diameter High Speed Steel Twist Drill Bit - Walmart.com
10Pcs Metal Drill Bit 1.1 2.0mm Pcb Exercise Cnc Router Bit Wood Drilling Tungsten Carbide Mini