How to tie Paracord knots to your backpacks. Great DIY how to with photos for all the different steps to make the knots. Great for zippers. I have a problem with zippers on my backpack every time I go hiking.
Spin two nuts onto the bolt, tightening them against each other. Then chuck the bolt into the drill and hold a hacksaw blade against the spinning bolt. The nuts help to steady the blade and clean off burrs when you unscrew them.