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OK, you're getting ready to fab a sheetmetal component for your latest project, and it involves drilling a bunch of holes along its perimeter for attaching screws, rivets, or rosette welds. You could grab your drill, extension cord, and a box of drill bits. But, in the time it'll take just to grab a bit, find the extension cord, and chuck up the drill, you'd have been well on your way to being finished with the chore. These handy tools are available in a myriad of places (we got ours from the Eastwood Company, www.eastwoodco.com). They are usually equipped with a good selection of die diameters so you can punch out an array of hole diameters. This is one handy tool that no fabricator or hobbyist should be without.