(1) is not allowed during the measurement feeler violent bent, or with a larger force hard to insert the feeler is detected gap, otherwise it will damage the precision of the measurement feeler surface or part surface.
(2) After use, feeler should be wiped clean, and coated with a thin layer of Vaseline industry, and then turn back feeler folder box, to prevent corrosion, bending, deformation and damage.
(3) storage, can not be put under heavy feeler to avoid damaging the feeler.