Item Type: Sliding Line Ruler_x000D_ Material: Carbon steel_x000D_ Size: _x000D_ Approx. 200mm / 7.9in_x000D_ Approx. 250mm / 9.8in_x000D_ Approx. 300mm / 11.8in_x000D_ Uses: Measuring marking marks, widely used in various types of mechanical processing marking 1Adopt magnetic stripe engraving, it has clear scale and convenient reading. 2The locking knob can fix the slide of the caliper, loosen it counterclockwise and tighten it clockwise. 3The product has fine workmanship without burrs, carbon steel forging, longer service life. 4Durable, not easy to damage, do not need frequent replacement, very convenient. 5Professional manufacturing, which makes it have stable characteristic and high reliability.1 x_x000D_ _x000D_ Sliding Line Ruler