A simple sprung bolt for light use. The spring sections are 0.6mm Hope someone finds it handy. Cheers Update: After using it for a while I have made some adjustments. I found that the internal slope needed a little more clearance as it started to clamp the bolt if I tightened it down hard. Also I changed the shape of the tip of the bolt slightly so it's more forgiving if things aren't 100% aligned when closing. The bolt and staple are now separate files and there are two extra variations on the bolt. I for the application i am using it for i do not require the staple and i needed a thin bolt but others may not so there is a version with a fatter bolt. Cheers I sliced it with 13.06.3 Cura with 1.1mm shell and it worked well It did not slice well with the old 13.04 SF based Cura