Standard Pack = 1 piece(s). Bar Diameter = 5/8 IN ; Head Diameter = 2 1/2 IN ; Hole Diameter = 5/8 IN ; Hole Spacing = 3/4 IN ; Offset or Travel = 3/4 IN ; Overall Length = 7 3/16 IN ; Shank Diameter = R-8 ; Shank Length = 4 IN ; Shank Style = R-8 Shank ; Type = Boring Head With Integrated Shank ;