The concentricity gages are used for inspection tasks on external, internal and flat surfaces of rotating parts. The concentricity of a round profile is of considerable importance for the manufacture of shafts, bushings, gear wheels or bearings.Sowant can produce the precision concentricity gages in two weeks and ship to you with a box.we also can offer your the acme thread gauges/API gauge,stub acme thread gauges,gagemaker products and allen gauges.