[Precise measurement, easy reading] Smooth metal wheel, loose finger design does not hurt the ruler, quick reading measurement, easy reading [High-quality stainless steel, carefully forged] Selection of high-quality stainless steel forging, using hardened process, never rust, more durable, longer life [Large-screen digital display, clear readings] Glass digital mirror, metric and imperial 2 modes to switch freely [Flexible measurement, fixing nut] Turn the nut to adjust the tightness, fixed measurement (clockwise, counterclockwise) [Laser scale, clearly visible] Laser engraving, fine forging process, the scale is clear, convenient and accurate readings