● Precision angle plates suitable for inspecting or testing angle. ● There’s micro magnetic on each plate, to avoid shaking when measure the working piece. ● Size:Length 3ʺ × thickness 1/4ʺ. ● Precision:± 0.0001ʺ. ● Material:S50C Hardness:HRC50°~55° MCL-C200 *10PCS MCL-C200 *12PCS