GRADE A GRANITE SURFACE PLATE 16" X 10" Drill Press Table Low Blade Speed: 1 Low Blade Speed: 1 With 500 screws per package • Meets DIN876 Grade 00 standard for inspection room or laboratory use• Made of natural granite free from deterioration or dimensional change over time• Minimal dimensional variation due to temperature changes• High density structure for extreme homogeneity• Surface lapped with satin matte finish to prevent glare• 100 percent corrosion proof• Non magnetic and non conductive• Measuring instruments and test equipment slide easily across the surface• Ideal for measuring tasks Supplied with a calibration certificate