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.

Guide bushings and drill bushings are used to guide drills, punches, pillars, or other tools. A bushing may be attached to the drill or rotary tool, or inserted into a jig to control hole location and ...