This latch is printed in 4 parts and I have prepared Gcode for all the files but I have included the IPTs and STLs if you want to make modifications. The pin goes into the hole on the bar after you put in the main chassis. The smaller chassis can be positioned across the gap between the door, gate, etc and the wall, fence, etc in line with the main chassis to allow the latch to work. I have included an assembly picture to make putting it together easier. If you have any questions please do contact me.