Boring Head Set, R8, Indexable with 4 Boring Bars 

The indexable boring bar set includes 4 different length boring bars each with two requiring a 7/16" minimum bore and two requiring a 1/2" minimum bore. The bore depth ranges from 1-1/14" to 2.5". The heat treated, alloy steel shanks are held to 0.000 to -0.0005" from the nominal diameter. The included indexable boring bars come with TCMT 21.5 C6 carbide inserts for steel and alloy. 1 DIV = 0.001 which means when turning the dial by 1 division/graduation, the boring head's travel is 0.001" in radius movement and 0.002" in diameter movement. The set also comes with torx & l-shape hex wrenches and a fitted carrying case.