elbridge level guide

https://4kultrahdrindex.clearminster.com/posts/why-4k-ultra-hdr-matters-for-cinematic-gaming

I found an old Elbridge level guide at a flea market and it's surprisingly practical for hanging shelves and frames in older houses where walls aren't perfectly plumb. The guide has both a vertical and horizontal bubble, and it's magnetic on one side so it sticks to steel studs or metal rails. It's not fancy, but it gives consistent readings without any digital fuss.