The vernier caliper has no light gap at the measurement leg and shows in the zero position and at 0. You must therefore actually be very accurate, because indexing errors are ruled out safely. The locking screw is sufficiently strong and the mobility of the leg is completely ok. However, not polished as expensive lessons and no automatic locking. But that is not to be expected in this price range and not professional use not required. Therefore, full marks - recommended.