This set includes 3" precision adjustable boring head with R8 arbor and 12pcs 3/4" carbide tipped boring bars.
* THE WIDE BASE BEARING SURFACE ASSURES MAXIMUM RIGIDITY EVEN WHEN THE BAR HOLDER IS OFFSET POSITION.
* HEAD HEIGHT: 3-5/32"
* 2 VERTICAL AND 1 HORIZONTAL HOLES.
* HOLE SIZE: 3/4"
* CENTER DISTANCE BETWEEN HOLES: 1".
* CROSS DIA.: 3/4"
* OFFSET: 1"
* THREAD BACK: 1-1/2"-18
* WITH REMOVEABLE R-8 SHANK.