Amazon.com: BOSCH CO2143 1-Piece 1/4 In. x 4 In. Cobalt Metal Drill Bit for Drilling Applications in Light-Gauge Metal, High-Carbon Steel, Aluminum and Ally Steel, Cast Iron, Stainless Steel, Titanium : Industrial
Amazon.com: Lichamp Step Drill Bit for Metal Sheet Heavy Duty, Genuine M2 HSS Step Up Down Drill Bit Stepper Unibit for Steel Hole, 10 Sizes from 1/4 to 1-3/8 inches : Industrial & Scientific
Tungsten Carbide Hole Saw Drill Bit, 32mm or 1-1/4, for Stainless Steel
Milwaukee Tool - Mechanics Drill Bit: Letter E (1/4″), 135 ° Point, High Speed Steel, Weldon Shank, Split Point - 63536676 - MSC Industrial Supply
Drill Bit Set 8 PCS Metal Drill Bits for Wood Impact Driver Steel Dril – SATC
Drill America 1-1/4 in. High Speed Steel Twist Black and Gold Reduced Shank Drill Bit with 1/2 in. Shank KFDRSD1-1/4 - The Home Depot