AccusizeTools - 12'' Master Precision Level in Fitted Box, Accuracy: 0.0002''/10'', #S908-C687 Go to amazon.com Related posts Top 15 machinist level FeatureSize: 12'', Accuracy: 0.0002''/10''Base Width: 46 mm, base with V-grooveAdjustable Main Vial 0.0002''/10'', with cross test vialWith insulating gripANSI standard, robust cast iron model