1. It is made of high-quality alloy steel. The hardness of working surface reaches HRC58-62 2. The accuracy of vise (parallelism and squareness) is 0.005mm/100mm 3. Quick to clamp and easy to operate 4. Used for precision measurement and inspection precision grinding, EDM and wire-cutting machine 5. It guarantees high accuracy in any position 6. Jaw with from 25mm to 150mmQGG vise: with screw QKG vise: quick action typeThe sine type can be adjusted from 0-45° vertically