Description:Woodworking 32/38/47/83Pcs Router Table Set Up Bar with Case Metric Gage Block Set Measuring Block GaugeSpecifications:Product NameWoodworking measuring blockMaterialSteelHardness800HVGrade0The Coefficient of Thermal Expansion ( 10-6/℃)11.5±1Density (g/cm3)7.8Flexural Strength (MPa)2000M..