A cutting hole (10) having a rod (16) with a connecting end at a proximal end (14) of the rod (16) adapted to be received by a surgical drill, comprising: a first diamond-shaped portion with six sides (18) formed at the proximal end of the rod and having first lateral edges (34b, 34c), the first diamond-shaped portion having a first pair of facets (34, 34a) that are located on a first tip (32) and a second pair of opposite facets； and a second six-sided diamond-shaped portion (20) axially spaced along an axis of the stem (16) of the first diamond-shaped portion (18) and having second side edges (30b, 30c), the second diamond-shaped portion (20) having a third pair of facets (30, 30a) that are located on a second tip (26) and a fourth pair of opposite facets, in which the first diamond-shaped portion ( 18) is adapted to be inserted in a coupling cavity complementary to the surgical burr, and in which the second diamond-shaped portion (20) is adapted to engage with a complementary locking ratchet of the surgical burr, characterized in that : the first lateral edges (34b, 34c) and second lateral edges (30b, 30c) are arched having a radius of curvature of an external diameter of the rod (16).Un taladro de corte (10) que tiene un vástago (16) con un extremo de conexión en un extremo proximal (14) del vástago (16) adaptado para ser recibido por una fresa quirúrgica, que comprende: una primera porción en forma de diamante de seis lados (18) formada en el extremo proximal del vástago y que tiene primeros bordes laterales (34b, 34c), teniendo la primera porción en forma de diamante un primer par de facetas (34, 34a) que se encuentran en un primera punta (32) y un segundo par de facetas opuestas； y una segunda porción en forma de diamante de seis lados (20) axialmente separada a lo largo de un eje del vástago (16) de la primera porción en forma de diamante (18) y que tiene segundos bordes laterales (30b, 30c), teniendo la segunda porción en forma de diamante (20) un tercer pa
