Standard Pack = 1 piece(s). 1st Max Cut Depth In = 1.6540 ; 1st Max Cut Depth mm = 42 ; Adapter/Shank/Bore Diameter Inch = 0.8661 ; Adapter/Shank/Bore Diameter mm = 22 ; Effective Cutting Diameter In = 1.9690 ; Effective Cutting Diameter mm = 50 ;