Testing labs, building owners, developers, contractors, universities, research institutions and government agencies on six continents choose the Dipstick because it produces the most accurate and repeatable flatness/levelness data – period. Dipstick readings are guaranteed to be accurate to 0.0125 mm – less than 0.0005″ (that’s 5/10,000ths of an inch!). Based on the thorough testing of every unit we manufacture, Dipsticks are typically accurate to 0.005 mm (0.0002).