This video, part 1, shows various ways to add paper rulers to your SAK (Swiss Army Knife), or other pocket tool, which you download and print out for free on your printer. Bonus tricks, mostly for the Victorinox Cybertool models (SAKs with an interchangeable bit driver tool) are also shown. Part 2 here:   • SAK Cybertool Grappling Hook (Part 2 ...  
Wide 12"/30cm ruler:
https://ruler-online.net/printable.html
Thinner metric/imperial rulers (I prefer) with aligned zero marks allowing length trimming:
http://www.vendian.org/mncharity/dir3...
Vendian has many styles to choose from, here:
http://www.vendian.org/mncharity/dir3...
Also consider this one:
http://www.vendian.org/mncharity/dir3...
Be sure your printer is set to full, 100% scale and NOT "shrink to fit".
Doug Ritter's free survival guide you fold up:
http://www.dougritter.com/psp_surviva...
I tried to shrink this single-sheet survival guide down to fit in my knife but my cheap printer has such low resolution (DPI ?) it didn't make it look very good. Your results may differ though.

Please share a link to this video with your friends and forums to help me grow my viewership, which is my only reward since all my videos are NOT monetized and I don't sell anything. THANKS!

This video was too long so I broke it down into two parts. This is Part 1. Part 2 with more Cybertool tricks is coming soon and then the fire kit video comes later after that.