Looks like a spirit level well made, Bubble centers on a known flat surface in any direction, Magnet sticks well to smooth steel surfaces.
Laser level Zitrek LL1V1H
36 Review
Laser rangefinder Xiaomi ATuMan Duka LS-P Laser Range Finder 40 m gray
119 Review
Thickness gauge CarSys DPM-816 PRO (Fe/nFe)
31 Review
Cullaby Contour Gauge: 10 & 5 Inch Duplications For Perfect Templates Of Curved And Odd Shapes, Plus Bonus Angle Ruler & Carpenter Pen!
23 Review