Use for cutting out undermount bowls, Surell, Fountainhead and other solid surface undermount bowls. For Corian bowls, must be used with a Corian bowl template, #57165, diameter (D): 3, cutting height (B): 3/16, shank (D): 1/2, overall length (L): 3-5/32, replacement collar: 47739, replacement bearing: 47745, 47747, C: 7/8 & 1, 57165 carbide Tipped 4 Wing cut out solid surface 3 DIA x 3/16 x 1/2 inch shank x 27/32 depth of cut