... chosen 3/4"hexagonal drive sha Concrete Scarifying Machine CSC200,200mm Working Width Product DescriptionFeaturesCutting depth adjustmentFront mounting lifting handle ... ,tamping rammer,vibratory truss screed,surface finishing screed,scarifying machine,gasoline water pump,drum roller,vibratory plate compactor,etc. ... . Bauma China (Dec. 27-30,2012) Concrete Scarifying Machine CSC200,200mm Working Width