● Applicable to measure vertical and horizontal degree. ● Made of alloy steel and grinded precision. ● There’s blade shape in oblique sides, easy and accurate. ● Right-angle precision: 0.004mm / 100mm ● Material:SKS3 . Hardness:HRC60°±2. MCL-TX304 MCL-TX306 MCL-TX308 MCL-TX310 MCL-TX312