Very strong desk clamp for swing lamps.  Raised enough so the finger screw on the lamp clears the desk.  Four bolts hold very tight but spread the load so it won't damage the desk surface. Underside cutouts allow for placement at a corner of an Ikea desk with bolt-on legs. Works much better than the clamp that came with the lamp.  It is intended for a work surface that is 34mm thick (you guessed it, from Ikea).

Print with at least 4 perimeters, 30% infill, 2.5mm top & bottom solid layers, and strong resilient plastic (PLA might be too brittle). Note the pressure plate only fits one way. Requires four M3x12 nuts & bolts and M2 washers.

Update: There are now two versions. The M3 version fits a 34mm work surface tightly.  The M4 version has a gap of 38mm so there's room for two 2mm rubber pads to reduce slippage. Obviously, the M4 version needs M4 nuts and bolts.