.The ruler belt is made of high-quality steel and has good toughness. After a special heat treatment process, the tape shrinks smoothly..The surface is treated with nylon matte coating, with clear oxide scale, no reflection and ghosting, strong and wear-resistant, and not easy to rust..The ruler shell is made of ABS material, which is beautiful and elegant, comfortable to hold, double protection, anti-fall and wear-resistant..Combined with an exquisite machine-pressed cloth strap, it is easy to carry and can be used in a variety of scenarios.. The ruler groove is calibrated at 0 points for more accurate measurement.