TNO Router Edger Profile Radius/Bevel M14Tornado diamond router edger, M14 thread. Electroplated diamond router bit for grinding a set profile along an edge. M14 thread fits most standard hand grinders. Upper ring and lower bearing prevent overcutting, ensuring the resulting edge stays uniform. Available in a variety of grits and profiles, radial and 45. See the below table for available combinations. 5R 10R 20R 45D 120G R R 60G R R R D 30G R R D 25G R