I am a machinist and engineer (MSME) for 30 years. Decided to try a $40 caliper to see if it was pro level ($140; Starrett etc) - it's not close. For a day trip that needs a basic caliper, this comes through. A professional will not see such things in his business. Price approx. For the performance, no. For durability and quality, NEVER. Save money and buy a professional caliper ($140). The difference is worth every penny!