Architecture Stencil. It is quite annoying to be always on the go and never have one when needed. The scale is 1:50 and I have tried to make it smaller(standard 1:100) but seriously do not recommend it. When I grew up and I joined architecture university, these stencils were a must have, nowadays with all the CAD modeling, these babies can be used by those who are really passionate about hand drawing and sketching on the go. I hope you enjoy it.
The necklace is design so you can unhook it from the base necklace and still have it wired to the base, making it comfortably to draw with and avoiding the issue of leaving without it.