I use this level to adjust guides on CNC plasma cutting tables. With this I can get a level that is as good as many of the "Master Mechanic Levels" that sell for many times the price. This is the quality I have come to expect from Starrett. It's durable (I travel a lot with it) and accurate. It was already calibrated when I received it but not certified. I checked the spirit level on a known granite slab and could not find any deviation in all directions. When the bubble is within the inner lines, you know you are as good as you can be. There are optical devices and laser devices that can be used to improve accuracy, but they often cost thousands or tens of thousands of dollars. This is sufficient for 99% of all applications.
Laser level HiLDA 4D/16 set 4
44 Review
Johnson Level & Tool 40-0912 Self-Leveling Cross-Line Laser Level, Red, 6 x 7 Inches
10 Review
π SKIL 24-Inch Digital Level - LV941901
8 Review
DigiPas DWL80PRO: Compact Digital Level & Angle Gauge - Accurate Protractor, Bevel Gauge, and Angle Finder, 0.05Β° Sensitivity, 4 inch Pocket Size
11 Review
TV bracket Kromax DIX-18 black
52 Review
π Johnson Level and Tool 400EM-S 12-Inch Heavy Duty Metal Combination Square for Professionals, with Inch/Metric Measurements, Silver - 1 Square
8 Review
Kapro 307-08-TMS Try And Mitre Layout And Marking Square With Stainless Steel Blade, 8-Inch Length
18 Review
β Stainless Steel L-Square, Size 3-Inch x 4-Inch, Zona 37-434
8 Review