This accurate precision tools are suited for checking location, hole size, gage slots, distance between holes, go & no-go gage, setting other gages and calibrating micrometers. / Metric size meets DIN 2269 standard / Each set furnished with case and every size gage holes clearly marked for size / Heat treated to 60/62 H / Centerless lapped with 10 micro finished and within .0001" round / Uniform 2" overall length / 0.01mm size increment /