Graphica gauges and tools manufactures and exports a wide range of thread ring gauges. These are precision engineered to provide efficient performance. These thread ring gauges are designed as per is, bs, din & american standards. As part of that the company offers metric gauges. These are manufactured from premium quality steel. These are specially designed for measuring wrench size, screw size, nut size, bolt and screw length. They are corrosion resistant and offered in different dimensions.