This bowl and horizontal crown bit features a radius and cutting diameter of 2-1/4" with a total cutting depth of 9/16". the shank is 1/2" in diameter. Horizontal crown router bits, also referred to as large bowl router bits, create large spherical indents in a variety of materials and can be plunged straight into the work piece. These are perfect for making large custom crown moldings, bowls, coin Trays, mA Nc all a game boards and other interesting projects. These can be used on solid wood and MDF.