Pro-Series 35mm EDM Stainless Steel Vise With Handle (3901-2755) ~ Square & Parallel to .00012″. ~ Hardened to HRC48-55. ~ Hardened and precision ground. ~ Made in Taiwan ~ Made of rust resistant stainless steel SUS440 classified as corrosion & heat resistant for EDM, grinding and other applications. ~ Compact screw rod design for easy tightening. ~ New structural design with higher repeatability and stability. Square & Parallel to .00012″. Hardened to HRC48-55. Hardened and precision ground. Made in Taiwan Made of rust resistant stainless steel SUS440 classified as corrosion & heat resistant for EDM, grinding and other applications.