- The "2020 Hinge" is the part that goes to an extrusion. - "2020 Hinge Panel" is offset for a 3mm or 5mm panel, depending which side you use. - 5mm or 3/36" smooth rod, 40mm long. sand the ends to a slight taper. - for 3/16", #9, #10 and #11 drills are handy. #11 for the friction fit side, #9 or #10 for the swinging part. - For 5mm rod, 5mm and 5.1mm or so for friction fit and swinging, respectively. - Drill bits that haven't been used on metal work best. - Once the hole is sized just under the pin size, an arbor press helps, but gentle taps with a light hammer should be all that's needed. - A 40mm long M5 screw will work too. Partially threaded is best. The pivoting hinge should be drilled out slightly for best movement. - If a pivot pin is used, sand a bevel into the ends if there isn't one there. I cut them out of smooth rod stock.