Vernier Calipers Stainless Steel 300 Mm Measuring Instrument Calipers Micrometer ,Easy to Use

1.Material is staninless steel, and all measuring plane is quenching, grinding 2.Accurate scribed graduation guarantees more accurate measuring 3.Thumb roll and knurled locking screw makes measurement and reading more convenient 4.With a fine-adjustment carriage to fine-feed the slider for heavy duty series 5. Only Measure inner diameters ,outer diameters