Product Description A set of gauge blocks, also known as gauge slips, made from high quality Tungsten Carbide. Each gauge block is marked with a traceable serial number. The gauge blocks are housed in a tailor made fitted protective case with sizes clearly labelled. Key Features - Tungsten Carbide material for highly increased durability and protection against machining workshop wear - Available in Grade 0 for Calibration, and Grade 1 for Inspection - High quality surface finish and high dimensional stability - Working surface hardness greater than 63HRC - Heat treated for high resistance to wear - Conforms to ISO standards for guaranteed accuracy and reliability - Supplied in a tailor made fitted wooden box/case Specification -Metric Tungsten Carbide Micrometer Check Set -M8, Grade 1 (Inspection Grade) , Comply with Standard: DIN 861 -Contains 8 Pieces of Small Blocks -Composition (mm) : -3.10, 6.5, 9.70, 12.50, 15.80, 19.00, 21.90, 25.00