Tough Bits. Designed for drilling sheet metal, Malco's Sheet Metal Double Ender drill bits are perfect for ductwork, metal flashing, and gutters. At only 2 inches long, they're tough to break — and when one end gets dull, you can use the other end. They come in a polished finish in sizes from 1/8 to 1/4 inch and in black nitride in 1/8-inch and #30 sizes. A 12-pack of 1/8-inch black nitride bits sells for $21. Malco, 800/328-3530. www.malcoproducts.com
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