Fish tail type drill point that circuit board was used

The utility model relates to a fish tail type drill point that circuit board was used, the brill body portion front end of this drill point extends there is drill flute portion, and be equipped with two cutting blade that are the inversion symmetry form in drill flute portion front end, and two cutting blade are formed with a concave part for being the crisscross department of relative slope form connection center, again in two cutting blade terminal surfaces all have lie in center one side outer fringe after by forward the center of crossing extend to in addition the side and be a cutting edge surface of the form that heels, and two the 1st cutting edge surface are formed with two cutting edge surface for backward stretching to one side respectively backwards, both junctions are formed with the drill tip portion that the straight line extends and be the protrusion form, concave part bottom surface center department is the pointed cone form and exceeds infiltrating in drill tip portion's distance for being formed with again, when drill point in when drilling, the unbearable contact earlier of alright utilization guides location messenger's torsion to reduce on the softness circuit board, and two drill tip portions can not direct contact on the softness circuit board, produce the beat when effectively avoiding driling or rock, and then promotion drilling precision and qualification rate.