特 点： 材质采用高级不锈钢,真空热处理后经深冷处理至硬度HRC50~55再进行研磨加工,因此本体不易变形。平行精度 ：0.003/100mm以内垂直精度：0.005/100mm以内Characteristics：Precision Vise of Stainless Steel for EDM, the material is stainless steel, have done vacuum harden treatment and deeply cold treatment to HRC50~55 before doing the grinding process, the essence is not easy to deformedParallelism:Within 0.003/100mmSquareness:Within 0.005/100mm