12 drill bit (twist drill) brands tested for speed and durability on spring steel, 304 stainless, and mild steel using various drill bit sizes and a drill press.  Drill bit showdown highlighted two very impressive brands.  All drill bits tested were between $10 and $40 per set.  Brands tested: Bosch, Craftsman, DeWalt, Harbor Freight (Warrior), Harbor Freight (Bauer), Ryobi, Walmart (HyperTough), Milwaukee, Metabo, Work Force, Black & Decker, and MasterForce (Menards).