Strong Desk Lamp Clamp for Narrow Overhang

Designed to be strong and stable even when printed with PLA. Will fit a table top overhang as narrow as 25mm (1") and thickness up to 30mm. Uses Buttress threads for strong clamping force without stripping. Chamfered edges on the body. Knurled knob on clamp bolt. I have two versions of these lamps, some have a 12mm stem, and some have a 13mm or 1/2" stem -- corresponding versions of the base with the respective socket diameter are provided for smooth fit. FreeCad files are included.

Update: I accidentally uploaded the 12mm version twice instead of the 13mm. Now corrected.