-knocks off sharp edges along every surface on a cylinder head
-small enough to fit almost everywhere, so you can get to most edges with ease
Dave’s take — I found this burr by accident and fell in love with the results.  We use it in the lifter area to debur around all the rough edges left over from the factory machining process.  I use this tool with air only and put the grinder on the highest speed for the best finish.