A tape measure with a built in pencil. Thoughts on this?
https://www.amazon.com/Imperial-Blades-IBQD25F-1-QuickDraw-Contractor/dp/B00P14T90W/ref=as_li_ss_tl?ie=UTF8&linkCode=sl1&tag=woodworkerz-20&linkId=50f78f059007c78c152eb20758f57602
https://www.amazon.com/Imperial-Blades-IBQD25F-1-QuickDraw-Contractor/dp/B00P14T90W/ref=as_li_ss_tl?ie=UTF8&linkCode=sl1&tag=woodworkerz-20&linkId=50f78f059007c78c152eb20758f57602