With many of your machines, of course, you want to take measurements to guarantee accuracy. The 1-2-3 MicroGage from MasterGage lets you do that in some tight spots. The Dial Indicator Carriage can be mounted with a lock screw to any vertical or horizontal edge of the 2" x 3" 1-2-3 Block. You can use the 3/8" flat-tip to measure round surfaces and blade edges. Use the 1-2-3 Block by itself to square up blades or fences, or put it down and attach the Dial Indicator Carriage to measure and set heights on routers, jointer infeed and outfeed tables, table saw blade heights and more. It’s small enough to fit in (formerly) restricted areas, and it costs $119, as of 2009.