With adequate lubrication in a drill press, carbide-tipped hole saws can drill through metal that is up to 5/8" thick. Though it’s possible to use a hole saw with a hand-held drill to bore a ...

The final test hole after sharpening came out smooth ... efficiently and decrease the amount of time it takes to drill ...

With the fate of repetitive motion injury looming due to the need to drill 1,200 holes, [bitluni] took matters into his own hands and built this nifty DIY hole punch for light-gauge sheet metal.