gsg micrometer maste are used to calibrate and set micromete. the master is superior to gage block calibration because they do require block stacks and therefore it is much faster to ipect the linear range of the tool. in addition they indicate wear on the micrometer anvil because it replicates how the micrometer is used.
model # 01-1e (english) model # 01-1m (metric) 01-1 diameter is stainless steel to reduce wear and prevent rust. hardened, stabilized, ground and lapped to +/-.0001. comes complete with storage case.
model # 16-1e (english) model # 16-1m (metric) 1.00/-6.00/ (25-150mm) diameter in 1.00/ (25.0mm) increments. case hardened, stabilized, ground and lapped to +/-.0001 (+/-.0025mm)
model # 16-1/2e (english) model # 16-1/2m (metric) 1/2â-6.00 diameter in 1/2 increments 12.5-150mm diameter in 12.5mm increments case hardened, stabilized, ground and lapped to +/-.0001 or +/-.0025mm. model # 112e (english) model # 112m (metric) 1.00-12.00 diameter in 1.00 increments 25-300mm diameter in 25.0mm increments case hardened, stabilized, ground and lapped to +/-.0001 or +/- .0025mm.