This is a 3d printable jig for drilling an array of evenly-spaced holes. The implementation was intended to drill hold-down, aka bench dog, aka MFT, holes in a bench top. Default settings are for a drill guide conforming to the Festool MFT de-facto standard. Of coue this is moot as you can change from 20mm to 3/4in or any other size. You can even make your own pegboard if so inclined. For more details, including example useage, visit the project's homepage, here: