● Size: Length 3ʺ × width 1-3/16ʺ.● Size of angle:1/2°. 1°. 2°. 3°. 4°. 5°. 10°. 15°. 30°● Precision:± 10ʺ● Material:S50C. Hardness:HRC50°~55°● Weight:1.7kg