Use for cutting out under mount bowls, Surell, Fountainhead and other solid surface under mount bowls. For Corian bowls, must be used with a Corian bowl template, #57166, Diameter (D): 3-5/8, Cutting Height (B): 1/4, Shank (d): 1/2, Overall Length (L): 3-9/32, Replacement Collar: 47739, Replacement Bearing: 47749, C: 1, 57166 Carbide Tipped 4 Wing Cut Out Solid Surface 3-5/8 Dia x 1/4 x 1/2 Inch Shank x 1 Depth of Cut