The BARCOR Electronic CHAMFER GAGE is a precision instrument designed specifically to measure the top diameter of chamfers, countersinks, center drills, or tapered holes. Simply press the Electronic CHAMFER GAGEs spring loaded Gaging Plunger into the piece being measured and directly read the size in .0002" or .005mm with the SAME gage. Or, at the press of a button, change to Comparative Mode from a known standard. Like BARCOR's well-known mechanical counterpart, the Electronic CHAMFER GAGE requires no Setting Master (Standard) or lookup chart. To Zero or Set the gage, just press the base against any flat ground surface and press the "on" button. Equipped with rechargeable long-life batteries, the gage may also be powered continuously through its 110 VAC adapter/battery charger or directly from a printer, PC, data collector, etc.