A pull-down mechanism. The distance of run is appr. 240mm. Most parts can be made from wood. What you need to get by yourself are some metal parts: E rings or circlips, bolts, nut(M3,M5),compression spring(inner diameter 10.5~11mm,wire diameter 1.5~2.5mm),some rubber material,glue, wood screws.This mechanism can be fixed on wall. DXF,STL, STEP, bill of material(BOM) and 2D drawing plan are included.Ignore the OBJ and FBX format files, they cannot be used, and they are just used to meet cgtrader's requirement.