1-1/2 in. x 22 in. One Piece Spline Masonry Core Bit, Milwaukee Tool, Mfr#: 48-20-5452

Spline Core Bit, Spline, 1 1/2 in, Maximum Drilling Depth 3 in, 22 in Overall Length, 3/4 in Shank Diameter, Not Applicable Shank Hex Size, Core Body Length 3 in, Not Applicable Shank Thread Size, Removable Connection Type