Starrett 128BZ Inside Micrometer Set consists of a satin-chrome micrometer head which can be used in combination with any one or more of a series of rigid, tubular steel measuring rods to obtain the required length. With (1) 4-6" Head, (1) each 2", 4", 6", 8", 10", 12" Rods, (1) 12" Ext., (5) 24" Ext. 6-150" Range, .001" Grad with Finished Case.
