• All sides are hardened & ground • Used for grinding, light Miliing, Drilling & inspection of round & square Jobs. • Accuracy for Flatness, squareness & parallelism within 0.005mm upto 150L & 0.010mm for 200L • Hardness 60 ± 2 RC. • Supplied in matched pair. Uniform and Strong magnetic pull to all three magnetic surfaces, Top, Bottom & V Faces. • Easy ON - OFF facility. • 120° "V" angle also available.