● Made of alloy steel and grinded precision. Good precision of Straight angle. ● There are screw holes on the panel for fixing mode and fixture. ● Parallel Precision: 0.003mm /100mm ● Right-angle precision: 0.005mm /100mm ● Material:SK2. Hardness:HRC56°±2 MCL-LB150 MCL-LB200 MCL-LB250 MCL-LB300