Freud Ogee Bowl Router Bit 85 007 1 2 Inch Shank 1 2 Radius (2 Dia 1 1 4 Carbide Height Non Marring Bearing Solid Surface Countertop Sink Trim) accessories Proprietary Diffusion Bonding Matrix: High temperature molecular Proprietary Diffusion Bonding Matrix: High temperature molecular bonding technology secures the carbide cutting head to the alloy steel body true concentric hole generation Heavy Duty Steel Shank: Solid 1 2 inch shank delivers high torsional rigidity to prevent bit flex during continuous commercial fabrication The 2 inch overall diameter cutter provides a 1 1 4 inch carbide height with a 15 degree tapered angle and incorporates a non marring synthetic guide bearing to glide along polished bowl walls without surface scratching or thermal burning