[3   Boring Head Tool Set with 8 Boring Bars]

[2   Boring Head Tool Set with 4 Boring Bars]

Index able Boring Tool Set with 2" Boring Head, R8 Shank & 4 Boring Bars ~ Boring head features a 1-1/2"-18 threaded back so you can change shanks as needed. ~ A micrometer lead screw provides 0. 001" direct reading accuracy and makes adjusting easy. ~ Boring head offset is 5/8". ~ Minimum boring diameter is 0. 394". ~ Maximum boring diameter is 5. 906". ~ Maximum boring depth is 1. 970". ~ The cross hole is 1/2". ~ R8 shank has a drawbar end thread of 7/16"-20. ~ The included index able boring bars come with TCMT 21. 5 C6 carbide inserts for steel and alloy. ~ The set also comes with torn & l-shape hex wrenches and a fitted carrying case. ~ A micrometer lead screw provides 0. 001" direct reading accuracy and makes adjusting easy. ~ 1 DIV = 0. 001 which means when turning the dial by 1 division/graduation, the boring heads travel is 0. 001" in radius movement and 0. 002" in diameter movement.