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This is a universal center punch template for 125B enclosures used by Pedal PCB. This was designed specifically for the powdercoated versions of the Tayda Electronics 125B. Powdercoating thickness varies. It is a little loose on the raw enclosures but it still works great! Press it firmly onto the enclosure and use the holes to align a center punch tool. From there I remove the template and then I like to use a 3mm drill bit and a hand drill to drill the pilot holes. Patience keeps the bit from wandering, and after you have the 3mm pilot holes a step bit and power drill will do the rest of the work.