Features 1.Vernier Calipers are made precisely by high quality steel or stainless steel throughout better heat treatment and surface treatment. 2.Their precision high, lifelong, rust resisting and easy to use. 3.They are mainly used for measuring internal, external, depth and steps dimensions. 4.We have Metric, Metric&Inch for supply. 5.According to accuracy, we have 0.05mm and 0.02mm. 6.Accoring to material, there arecarbon steel and stainless steel, choose by customer.