Insert for drill

A drill insert with a corner part and an upper face, the upper face having a first side and a second side disposed on both sides of the corner part, respectively, comprising:

• a first cutting edge formed along the first side;
• a second cutting edge formed along the second side;
• a first region of the upper face located along the first cutting edge;
• a second region of the upper face located along the second cutting edge;
• and
• a first raised part which is disposed in the first region and is configured to lie at a higher position than the second region, wherein
• the first raised part comprises an upper portion, a breaker portion configured to be inclined so as to become lower as the first raised part extends from the upper portion toward the first cutting edge, and a side portion configured to be inclined so as to become lower as the first raised part extends from the upper portion toward the second region, and
• the first raised part is disposed at a position closer to the first cutting edge than a bisector of an angle formed between the first cutting edge and the second cutting edge when viewed from above, and
• an inclination angle of the side portion is increased as the side portion extends toward a center of the upper face.