Bowers Metrology is world renown for their bore gages and other metrology equipment. Their products are imported into the U.S. by Fowler High Precsion and sold through Gaging.com as one of their dealers.  In addition to their wide range of standard three anvil systems, Bowers Metrology has a huge selection of custom bore gages available.  These gages can be used to measure grooves, spline, thread, slot and more!

For more information on special heads take  a look:
Bowers Special Application Guide. 

We at Gaging.com are experts in quoting custom gages for various applications.  Combine our knowledge, service and great prices and you will not find a better place to buy Bowers Bore Gages.